I'm not majoring in physics so i really love that you are providing this lectures for free and to everyone. It feels good to study something you won't have an exam about. Thank you again sir.
Your lectures were a huge influence on me back when I was in high school (2010-13). I am from a third-world country and didn't have that many great resources back then. But your high-quality courses and a few others were freely available on OCW. Now, I am finishing my PhD in math. I thank you and MIT for making this accessible to everyone across the globe!
I have graciously quoted Dr. Lewin as an RF Engineer when working with Test Engineer on systems I've built more times than I can count. Such a beautiful and meaningul quote which will remain true and prevalent FOREVER!!!!
@@lecturesbywalterlewin.they9259 Sir! I am a physics aspirant. I dream of becoming a physicist since I was in 4th grade. I love reading and would ask for a beginner who knows the basics of the theoretical fields but is still learning should he read your 'love for physics' or The all of 'The theoretical minimum book's for a better view at physics.
I am a physicist working in Brazil and your lectures show that is perfectly possible to be a good researcher such as a great teacher, indeed. You are a example to be followed.
Whenever I don't understand something that I'm learning in Year 11 physics, I have a look on this channel to see if there's a lecture on it. Thank you very much for providing all this content for free!
Thanks a lot sir. You are one of the greatest teacher whose work I have experienced. Your videos are helping millions in the world. Long live sir. Kudos.
@@lecturesbywalterlewin.they9259 Sir can you explain me why a magnet levitates on superconductor even if it was already placed during the process of cooling . According to the Faraday's law if the magnet was stationary on superconductor the rate of changing magnetic flux must be = 0 . But still a current gets induced in superconductor. Please answer me with this.
you can get a scholarship. you deserve it, it's there for people in your situation. don't use that as an excuse to not go. you can be apart of MIT if you really wanted to.
@@lecturesbywalterlewin.they9259 He speak right You are an excellent professor of physics who explains Theoretically and practically We do not find anyone like you in Arab countries, *You give hard work ,for free and for every one Thank you sir
Sir I am in Grade 11 from India. I have also developed an interest in Physics and trying to get better at understanding it by watching some videos. But your lectures added a whole new dimension to the way I see Physics. The vigor and enthusiasm that you showed in experimenting your assumptions really moved me. Other teachers work with equations, but you really proved that those equations and measurements are not lifeless and how the uncertainties are so important for measurements. I hope you keep your amazing work going that teaches such valuable lessons for free to everyone.
Thank you sir, i am a NEET aspirant in INDIA and is thankfull to you and Alakh pandey far providing such an excellent content for students, thank you sir !!!!
@@tecver8433that's the question...!Actually i am too preparing for NEET 2024! And you are so late on this video like you are studying the 1st chapter....you are ded brooo! No revives
@@MeRoasts neet aspirants can be in grade 8,9,10,11,12 . Most people start from 11th so highly doubt anyone in their 12th are watch the first lecture. unless you are.
The first lecture was quite wonderful sir . I am from India and right now preparing for jee 2025. MY aim is for AIR 1 in the whole of India. The lectures are very reasonable and practically interesting that I can understand physics in depth now as of before (I wasn't able to understand at all)
Experiments are everything. I had this 802x course with Walter Lewin and till today (10 years later) I still show those videos to my students. After all it's hard to find good experiments to show to our students. Make them ourselves is expensive, so Mr. Lewin's experiments help a lot my students to understand physics SEEING it !!! Thank you Mr. Lewin 🙏
I wish to study Physics, but it is not an area of great opportunity here in my country. The education system is solely based on solving exam questions and memorizing formulas and so I hope to continue my education abroad. Seeing this channel and watching its videos has truly made me hopeful for my academic career. It is really a breath of fresh air to be taught the backgrounds of the things we study AND have them backed up by experiments! Thank you so much for making these courses available here on UA-cam, you truly are the best!
I'm a chemistry student from the UK, but my interests lie moreso towards the theoretical and physical fields of chemistry - so, the content covered here is immediately relevant to me. This, along with a number of other physics and maths courses, I am using to supplement my learning over the summer and prepare me for further chemistry studies come this September. I want to thank you, Professor Lewin, for having an immediately infectious enthusiasm for the subject that you're teaching, such that I am but only 2 minutes in and already wanting to watch more. I also want to thank you for making this content so accessible, and making it a genuine pleasure to watch and learn. I will certainly be fully engaging with both physics i and ii over the summer, and I will most definitely be attempting the assignments and exams linked. Thank you for all your work again, Professor.
I'm an incoming prefrosh at MIT and struggled quite a bit during my physics class in high school. Your videos have really helped me fall in love with physics. Thank you so much, Professor Lewin!
Hello Professor Lewin, I hope this message finds you well and in good health. I just wanted to say thank you so so much from the bottom of my heart for all the effort you've put in creating your lectures and making physics enjoyable for me and many other people who have otherwise never had much interest in it before. Your passion for the subject, even up until today, is extremely admirable. I've been using your lectures to prepare for my upcoming AP Physics C classes and I've always found myself either laughing, scribbling notes, or nodding in agreement. I've seen very few teachers that are capable of making their content so digestible, engaging, and entertaining to the extent that you have with your 8.01, 8.02, and 8.03 lectures. Even if you are physically in your 80s, your mental youth shines through you like a star. You truly are an inspiration. Sincerely, Alex
That was the most fascinated lecture I've ever seen in my whole life I never thought I would be interested in physics as a way of understanding the life around us, and not just some lectures which I'm obligated to study in order to pass my exams. I wish I've watched this 7 years ago, but it's never too late. Sir, thanks a lot.
Just wanna say thank you Prof Lewin for showing us how beautiful and fascinating physics can be. Only because of this have I decided to become a physicist. I have been watching your lecture videos for years and they influenced me more than you could ever imagine. I am now a physics tutor in our school and I helped countless students to solve physics problems, and they said I am a great teacher. But deep in my heart, I know that it's you there all the time. My understanding of the concepts, my teaching skills, and my methods to convey ideas, really come from you. I could not afford (and probably would be rejected from😅) MIT. These videos gave people like me a great opportunity to appreciate what high quality education should be like. They are truly priceless treasure for us.❤
“Any measurement you make without knowledge of its uncertainty is meaningless” (Lewin) is by far and without question one of the most rudimentary but also most meaningful quotes I’ve ever heard. As an engineer, this is a concept that alludes so many of my peers whom have consciously decided to stop learning after getting their BS “EE” degree (pun intended). Here I am a decade into my career, working in my Ph.D in EE, and I still love watching his videos as much (if not more) than I did when I first watched the Physics I playlist.
Sir thank you for providing lectures free to all, due to my financial problems i didnt ever thought to get teach by a MIT professor. But from You, I understand every concept of Physics.
I am senior in High School in Michigan, and I am fortunate enough to have an excellent math and science department at my school. That being said, I take what I learn in class, and come home and watch your lectures that correspond to the lessons in class, and it enhances the knowledge I am able to absorb exponentially. I am wondering how you were able to secure such a position at MIT; what were the steps you took to kickstart your career? I will be attending Michigan State University to major in Mathematics and Astrophysics, and in the future I can see myself in a position similar to the one you held. I want to go into research and have the opportunity to teach at a major university someday!
You're phenomenal sir , i always found physics boring because of the teacher in my school you really turned physics really interesting for me , made me realise that physics doesn't lie only in formulas . Thank you so much i really wish if i could meet you someday ❤
I just discovered this channel and I'm completely in love.... my chemistry teacher recommended this because I said him that "I lost my love for physics" and now I think I can work it out.. you are a great lecturer.... Thank you...
The moment you wrote the values of h1 and h2 with three decimal places each, is the essence of this lecture, which is also in conformation with the statement- 'Measurement without uncertainly is meaningless', that's all I learned from this lecture. Thank you very much, Sir!
I am 17 years old Indian student. I have dystonia which restrains me to do many physical activities. I found my love for physics when I was 13 being fascinated by black holes and decided to become a theoretical physicist since then. Currently, I am preparing for JEE 2021 mains not for admitting myself in an engineering college, but just to get a deeper understanding of physics and math. I was hoping if you can give me some career guidance and what should I do further. I think your lectures are where the concept of physics actually unveils itself. Love your lectures!
I am in 8th grade right now and I want to become a theoretical physicist so I thought it would be good to learn the topics right now so i finished calculus and started the MIT lectures on classical mechanics. I have been learning from 8.01SC and 8.01x and i really like the way you perform a no. of experiments and demonstrations in your lectures.
Curious? Crazy 'bout physics? See every single aspect of life in a different way? Want to convey your thoughts but do not have the appropriate knowledge to express it on paper? If you have all these things You are a theoretical physicist. All you want is a platform
Thanks sir here a jee aspirant who took almost two years to be fully furnished with vectors to electricity you just brought that in few hours..you are a real gem . thanks again sir
The first time I saw your lecture I was at University studying electrical engineering. At that time you help me a lot to really understand physics, now almost 10 years later I've come back to see you again because now I teach physics. Thank you! I'm from Mexico by the way.
Thanks a lot professor. I'm studying by my own schedule, and i'm trying hard to learn physics the best possible way, considering my uncertity of the "measurement" of which one is the best way 'quantitatively' speaking hehe, but / and i can say your lectures are, at least, amazing. thanks!
I’m 16 (sophomore in high school and homeschooled) and I’m taking physics right now. It’s with a book and while I’m sure it’s a good textbook and workbook I wanted to know more and I think it’s good to learn from multiple “sources” or whatever word you’d like to use. While I don’t plan on becoming a physicist, I do find physics quite interesting (the most interesting branch of science thus far. I still haven’t done chemistry yet though). I’m very grateful for free videos like this. Knowledge is a wonderful thing and it’s amazing when it’s easily accessible
Great great respect to you sir i m studying frm ur vdos after 8 yr , really very helpful everything is crystal clear thank for providing lecture on you tube 🙂🙂🙂
One of the best Physics Lectures I had ever seen. I love how every concept is explained in immense detail and learning has been made accessible to students all across the world..
I swear I’ve learnt this this multiple times at school but never have I appreciated and fell in love w physics more, it’s always been my fav subject but the way you thought it, I swear i didn’t fall asleep once and for once my brain cared more about the experiment then the marks
8.01 Physics Hans C. Ohanian 2nd edition W.W. Norton & Company ISBN 0-393-95748-9 8.02 Physics for Scientists & Engineers by Douglas C. Giancoli. Prentice Hall ISBN 0-13-021517-1 8.03 Vibrations and Waves by Anthony French CRC Press ISBN 9780748744473 8.03 Electromagnetic Vibrations, Waves and Radiation by Bekefi and Barrett. The MIT Press ISBN 0-262-52047-8
Lectures by Walter Lewin. They will make you ♥ Physics. Thank you so much for your efforts professor. Are there any good alternatives to Hans ohanian book? It seems hard to get here. My goal is to understand physics and to do research in fluid physics(theoretical). Please provide any directions and I have no problems with math.
As a retired university psychology professor I started studying physics about 5 years ago on my own. Your wonderful lectures have contributed greatly to my understanding (such as it is) and love of physics. Thank you.
I am 54, didn't do that great at school, BUT wish I'd had a teacher like you, You Sir now have a new subscriber, and I am goin to try and learn more from you, Thank you
At the 22:05 the end of femur argument - does this indicate that Galileo's argument is not right and the limiting factor is d/l should be with in certain limited range
Who else is wondering where the error was in the argument that d/l is proportional to l? It looked pretty convincing. The data seem to show that d/l is pretty close to a constant, or put another way that d is proportional to l. One explanation could be that the strength of the bone material varies between species (for example one animal might have a more hollow femur than another). We might also need to consider how the animal moves. For example horses pound the ground quite hard when they gallop at top speed as opposed elephants which don't seem to need to run as fast, so the pressure on the femur is not only proportional to the mass but also to how much the animal accelerates.
@@lecturesbywalterlewin.they9259 Well I assumed that the reason the d/l ratio didn't work out the way we assumed it would is because of the fact that you cannot compare an elephant to a mouse (a (hypothetical) scaled up mouse isn't an elephant by any means. It's just the same size as an elephant. The bone structures, amongst other things would be very different). I'm pretty sure the square-cube law works if you consider the same species. For example, that law says that King Kong cannot exist (apes cannot be that big)
Excellent lecture of physics.I am a collage student whom studying in Macau University of Science and Technology major in CS.I had to admit that the way of your teaching is very interesting and meaningful ,and this class help me a lot.Thanks for your lecture.
Hello Professor Lewin..! It is 3 and a half years now since I first started 8.01x and completed it, when I was in 11th grade. I used to take the notion of uncertainties in measurements quite lightly until I came across your lectures. I inculcated the importace of uncertainties and errors. When I used to include uncertainties in my experiments, in high school, most of my friends who were preparing for even JEE and other competitive entrance exams, at that time, used to say it was a waste of time. But I never stopped including errors in my experiments; I always include them, even now; as Professor said: "Any measurement without the knowledge of its uncertainty is meaningless." -- also the very first legendary phrase in his book "For the Love of Physics". And today, after 3 and a half years later, I was able to calculate the coefficient of thermal conductivity of cork with an uncertainty of about 3.5 percent in my university practical exam despite quite unfavourable surrounding conditions. And my measurement was in agreement with the theoretical value as it was "within the uncertainty of the measurements". Thank you Professor Lewin for all these wonderful videos, course material including problem sets, tests, ....everything.. from all the courses. These lectures are 24-K gold; or, may I say--whatever Professor Lewin touches turns into Gold. They have made me LOVE Physics! Thank You Professor Lewin...!! Thank You for everything sir...!!!
I am a bit confused on calculating uncertainty around 32:44 , how did he get an uncertainty of .008 and not .004? wouldn't the difference be between .783 and .549 resulting in .004?
I know it's 5 months old comment but I am commenting anyway to help other people having the same question. Here is why. The max value of t1/t2 = 1.4262 and min value of t1/t2 is 1.4087 so max - min = 0.0175. Our final answer is something like X +- uncertainty so X is supposed to be in the middle of max and min. So, if you divide max - min by 2, you get 0.00875. Since we set the precision of uncertainty to be 1000th place, you either get +-0.009 or +-0.008 depending on how you round and I think he chose to round down, and that's why the uncertainty is +-0.008.
I have never seen such a beautiful representation of units and measurements. Now, I am trying seeing d/l everywhere. Thank you sir, for helping me observe physics around us. You are a great teacher.
Good god. the quality of education in the west is NOT proportional to the quality of education in the middle east. I feel like I have been robbed of a good education ... of the love to know more.
+Waleed Mohamed it's not just in the middle east or any of the poorer countries really. i went to government school in an oecd country, the quality of education was crap compared to people going to private schools. political leaders are not really interested providing quality education to the masses. it undermines their position of power if the majority of the population gets a good education instead of a small elite. now i can see from sources like MIT opencourseware and Khan academy what good quality teaching is.
we're in the same situation in Costa Rica, there's a hugeee difference between public and private education, most scientific carreers are filled with people from private education. I come from public education and I started loving physics not because of my teachers, but because I've always loved the moon and the stars! it's so sad that so many people around the world get stolen the beauty of curiosity and good education
haha no, don't worry, I've learned that if you have passion for something, nothing and nobody can steal it from you, it just becomes your everything and what makes you feel alive :D greetings from Costa Rica!
My brother is a big fan of yours, he likes physics because of you and he wanted to become a physicist, but our parents did not allow it, they wanted him to become an engineer because of the higher paying job and he passed JEE. Couldn't pass advance. Due to this stress he commits suicide.Most of the parents in India want their children to become doctors or engineers. They do not give any importance to the passion of children.
Very thanks Mr. Lewin for you lectures. These lectures will be a great help for my academy and personal growth. Excuse me for my English, I'm from Colombia and I'm learning English since the beginning of the Covid 19 lockout in my country.
These Lectures Are Awesome Mr. Lewin, I'm just 11 years old and I can understand your lectures as clear as water. Keep making these kinds of lectures Mr. Lewin!
Sir, in this method of dimensionally equating the two quantities, when we add a constant(after removing the proportionality sign), we take it as a dimensionless constant since our dimensions are already equated.But equations of gravitational force and some others have a constant which have dimensions(planck's constant and G are examples).Why so sir?
I showed you some striking examples of dimensional analysis. I also showed you how you can be fooled by it. In case there are constants that have dimensions, the simplicity stops. Countless constants in physics have dimensions.
May your bond grow stronger with each student passing day . Your love for physics is inspiration of today's students. About How Beutiful physics is . And how beautiful your techniques to teach physics ❤
Watch all my 94 MIT course lectures. Start with 8.01, then 8.02, then 8.03. Do all the homework and take all my exams. Homework and exams are posted below the video thumb nails. Take 2 full months to do ALL of 8.02, then 3 full months of 8.02 and if you still have time left take 4 months for 8.03. This is a MAJOR commitment. You will have to spend on average every day 2 hours on this - YES EVERY DAY. *I guarantee you that you will then NOT fail your Physics portion of your exam*
Thank you professor for these free lectures. I am a senior high school student about to major in Biology. Your lectures allow me to expand my physics knowledge, as I won’t be able to do so in my major. I will be watching and studying them thoroughly in my free time.
Woo this is in a totally different scale, the education from United States vs Colombian education, now I see why people say that learn another language is a powerful weapon, thanks for share with us
I'm not majoring in physics so i really love that you are providing this lectures for free and to everyone. It feels good to study something you won't have an exam about.
Thank you again sir.
:)
Well said. Exams can be quite a dissuading factor
For free and that is a great price!
That's for damn sure, makes it feel so much more rewarding and pleasurable where there is no daunting expectation.
@@bane8956 the price he had to pay
Your lectures were a huge influence on me back when I was in high school (2010-13). I am from a third-world country and didn't have that many great resources back then. But your high-quality courses and a few others were freely available on OCW. Now, I am finishing my PhD in math. I thank you and MIT for making this accessible to everyone across the globe!
A Measurement without the knowledge of Uncertainties is Meaningless.
- Walter Lewin sir ♥️🙏
Excellent
@@lecturesbywalterlewin.they9259 Thankyou 🙃
@@lecturesbywalterlewin.they9259 ❤I discovered my own theory is called " Joshi effect ' for prove time is tool on certain terms
I have graciously quoted Dr. Lewin as an RF Engineer when working with Test Engineer on systems I've built more times than I can count. Such a beautiful and meaningul quote which will remain true and prevalent FOREVER!!!!
@@lecturesbywalterlewin.they9259 Sir!
I am a physics aspirant. I dream of becoming a physicist since I was in 4th grade. I love reading and would ask for a beginner who knows the basics of the theoretical fields but is still learning should he read your 'love for physics' or The all of 'The theoretical minimum book's for a better view at physics.
"I want to bring this to a test" - that's what makes you different from ask other teachers. Hats off.
Got those mad chalk skills. That's how you know it'll be a good series.
@@imranhbahmed7563 Thank you very much. Youbare a life saver.
Hello Sir love from India 🇮🇳 We Indians have a lot of respect towards you and see you as an inspiration
Thank you 😊❤
Yeah ☺️☺️
My dream was theoretical physicist.
Now, because of your wonderful lectures, my dream is theoretical physicist and a good teacher!!^^
good luck!
Hello what are you doing now in physics ? Please tell I wanna become a researcher in physics
@@yagnikdhameliya6332 Now her dream is to be a waitress at a McDonald's ... jk 😂
@@yagnikdhameliya6332 I hope she's really a physicist. I like it when people follow their dreams.💛💫
👍
I am a physicist working in Brazil and your lectures show that is perfectly possible to be a good researcher such as a great teacher, indeed. You are a example to be followed.
Whenever I don't understand something that I'm learning in Year 11 physics, I have a look on this channel to see if there's a lecture on it. Thank you very much for providing all this content for free!
That's great!
U r the first teacher in my life who wants that their students love Physics
U r great sir
Are you from Vidya Niketan or Vidya Mandir School
Thanks a lot sir. You are one of the greatest teacher whose work I have experienced. Your videos are helping millions in the world. Long live sir. Kudos.
Thanks for your kind words
Lol. He has only got 160 000 views so not really millions. just messing around. Thx for the great video
Samarjeet Saluja no he has 11,951 532 views in total.
@@lecturesbywalterlewin.they9259 Sir can you explain me why a magnet levitates on superconductor even if it was already placed during the process of cooling .
According to the Faraday's law if the magnet was stationary on superconductor the rate of changing magnetic flux must be = 0 .
But still a current gets induced in superconductor. Please answer me with this.
@@PayasTheGod he is dead bro
I could not afford to attend MIT, even in two lifetimes. Thank you for uploading these lectures.
mit gives full scholarship for students who cant afford
you can get a scholarship. you deserve it, it's there for people in your situation. don't use that as an excuse to not go. you can be apart of MIT if you really wanted to.
I wish if I had a professor like you in Egypt.You sir opened a new passage in my mind to rediscover any thing and every thing .thanks
thanks for your kind words
@@lecturesbywalterlewin.they9259
He speak right
You are an excellent professor of physics who explains Theoretically and practically
We do not find anyone like you in Arab countries,
*You give hard work ,for free and for every one
Thank you sir
do not forget Dr. Ahmed Zewail, the Egyptian one , who won the Nobel Prize in Physics's,
Sir I am in Grade 11 from India. I have also developed an interest in Physics and trying to get better at understanding it by watching some videos. But your lectures added a whole new dimension to the way I see Physics. The vigor and enthusiasm that you showed in experimenting your assumptions really moved me. Other teachers work with equations, but you really proved that those equations and measurements are not lifeless and how the uncertainties are so important for measurements. I hope you keep your amazing work going that teaches such valuable lessons for free to everyone.
did u pass jee did u do ittt????/
@@TvishaGoindidid he ever say he was preparing for jee?
Thank you sir, i am a NEET aspirant in INDIA and is thankfull to you and Alakh pandey far providing such an excellent content for students, thank you sir !!!!
Did u got selected in neet or not
@@tecver8433😮😮😮bro even me neet aspirant but this videos are very interesting
@@tecver8433that's the question...!Actually i am too preparing for NEET 2024! And you are so late on this video like you are studying the 1st chapter....you are ded brooo! No revives
@@MeRoasts neet aspirants can be in grade 8,9,10,11,12 . Most people start from 11th so highly doubt anyone in their 12th are watch the first lecture. unless you are.
@@MeRoastsneet was today..... How did it went?
[Date i wrote this comment 5 May 2024]
Thank you Dr. Lewin. you are really a legend in physics. i am blessed that i born in your era, so that i can learn from you physics.
+Sherly Shaju excellent
+Sherly Shaju if you born in his era you will not be +Sherly Shaju and you may not have the same aim which you have now.
The first lecture was quite wonderful sir . I am from India and right now preparing for jee 2025. MY aim is for AIR 1 in the whole of India. The lectures are very reasonable and practically interesting that I can understand physics in depth now as of before (I wasn't able to understand at all)
If you watch these lectures with honesty then you definitely score full marks in physics in jee advance and mains
Now u have the competition
I like how the lecture starts from scratch. I hope it will be the same here in India for science students, it really helps.
I love how he first throws out the imperial system and uses the metric instead. True European.
Experiments are everything. I had this 802x course with Walter Lewin and till today (10 years later) I still show those videos to my students. After all it's hard to find good experiments to show to our students. Make them ourselves is expensive, so Mr. Lewin's experiments help a lot my students to understand physics SEEING it !!! Thank you Mr. Lewin 🙏
Probably the best physics teacher of all time, that fact that his lectures are freely available is such a contribution to society - Thanks!
Wow studying units & dimensions was never this interesting before, totally loved it ❤️
I wish to study Physics, but it is not an area of great opportunity here in my country. The education system is solely based on solving exam questions and memorizing formulas and so I hope to continue my education abroad. Seeing this channel and watching its videos has truly made me hopeful for my academic career. It is really a breath of fresh air to be taught the backgrounds of the things we study AND have them backed up by experiments! Thank you so much for making these courses available here on UA-cam, you truly are the best!
Hlo bro,
This is the same situation of india...regarding educational issues
Did you succeed?
Lol same in India, it's just exam exam exam exam
I'm a chemistry student from the UK, but my interests lie moreso towards the theoretical and physical fields of chemistry - so, the content covered here is immediately relevant to me. This, along with a number of other physics and maths courses, I am using to supplement my learning over the summer and prepare me for further chemistry studies come this September. I want to thank you, Professor Lewin, for having an immediately infectious enthusiasm for the subject that you're teaching, such that I am but only 2 minutes in and already wanting to watch more. I also want to thank you for making this content so accessible, and making it a genuine pleasure to watch and learn. I will certainly be fully engaging with both physics i and ii over the summer, and I will most definitely be attempting the assignments and exams linked.
Thank you for all your work again, Professor.
My assignments that sir provided aren't opening..can u suggest me how to get access to that beautiful notes , assignments and solutions pls.
@@rosedawson8751idk how do you
I'm an incoming prefrosh at MIT and struggled quite a bit during my physics class in high school. Your videos have really helped me fall in love with physics. Thank you so much, Professor Lewin!
Best of luck!
Hello Professor Lewin, I hope this message finds you well and in good health. I just wanted to say thank you so so much from the bottom of my heart for all the effort you've put in creating your lectures and making physics enjoyable for me and many other people who have otherwise never had much interest in it before. Your passion for the subject, even up until today, is extremely admirable. I've been using your lectures to prepare for my upcoming AP Physics C classes and I've always found myself either laughing, scribbling notes, or nodding in agreement. I've seen very few teachers that are capable of making their content so digestible, engaging, and entertaining to the extent that you have with your 8.01, 8.02, and 8.03 lectures. Even if you are physically in your 80s, your mental youth shines through you like a star. You truly are an inspiration.
Sincerely,
Alex
:)
That was the most fascinated lecture I've ever seen in my whole life
I never thought I would be interested in physics as a way of understanding the life around us, and not just some lectures which I'm obligated to study in order to pass my exams.
I wish I've watched this 7 years ago, but it's never too late.
Sir, thanks a lot.
:)
No one can teach physics better than you sir ❤️ 6 years later I am studying from your lectures which never gets old🙏🏻🙏🏻
It's my pleasure
This dimensional analysis is so much better then the "conversion factor" bs in chemistry
Just wanna say thank you Prof Lewin for showing us how beautiful and fascinating physics can be. Only because of this have I decided to become a physicist. I have been watching your lecture videos for years and they influenced me more than you could ever imagine. I am now a physics tutor in our school and I helped countless students to solve physics problems, and they said I am a great teacher. But deep in my heart, I know that it's you there all the time. My understanding of the concepts, my teaching skills, and my methods to convey ideas, really come from you.
I could not afford (and probably would be rejected from😅) MIT. These videos gave people like me a great opportunity to appreciate what high quality education should be like. They are truly priceless treasure for us.❤
5:33 A measurement without knowledge of the uncertainty is meaningless.
:)
I m watching this after 6 yrs and still this is the best video ever .. I am in love with the way you explain us sir Thanks a lot :)
Sir, I am studying in class 11 and I am so excited to explore more education from you in physics
Thank you so much, seeing how an expert does physics is an exceeding privilege.
“Any measurement you make without knowledge of its uncertainty is meaningless” (Lewin) is by far and without question one of the most rudimentary but also most meaningful quotes I’ve ever heard. As an engineer, this is a concept that alludes so many of my peers whom have consciously decided to stop learning after getting their BS “EE” degree (pun intended). Here I am a decade into my career, working in my Ph.D in EE, and I still love watching his videos as much (if not more) than I did when I first watched the Physics I playlist.
Sir thank you for providing lectures free to all, due to my financial problems i didnt ever thought to get teach by a MIT professor. But from You, I understand every concept of Physics.
You are most welcome
I have to say I've never seen a more interesting way of teaching physics before it's so nice and engaging.
THANK YOU SIR for building my interest in physics i am a 11th grade student from india. thanku so much 🙏
ua-cam.com/video/PtxXWSQv0z8/v-deo.html
I am senior in High School in Michigan, and I am fortunate enough to have an excellent math and science department at my school. That being said, I take what I learn in class, and come home and watch your lectures that correspond to the lessons in class, and it enhances the knowledge I am able to absorb exponentially. I am wondering how you were able to secure such a position at MIT; what were the steps you took to kickstart your career? I will be attending Michigan State University to major in Mathematics and Astrophysics, and in the future I can see myself in a position similar to the one you held. I want to go into research and have the opportunity to teach at a major university someday!
My life story is in my book "For the Love of Physics"
yea zach, i went to pioneer. u sound pretty dumb
You're phenomenal sir , i always found physics boring because of the teacher in my school you really turned physics really interesting for me , made me realise that physics doesn't lie only in formulas . Thank you so much i really wish if i could meet you someday ❤
I just discovered this channel and I'm completely in love.... my chemistry teacher recommended this because I said him that "I lost my love for physics" and now I think I can work it out..
you are a great lecturer.... Thank you...
I really thankyou Mr proffessor. Walter lewin sir...
best lecture ...(watching in 2020)
edit: Love from India.
I'm 22 now and fell in love with physics because of this man again.
Ahhh..me too
love from India with great respect sir.....
The moment you wrote the values of h1 and h2 with three decimal places each, is the essence of this lecture, which is also in conformation with the statement- 'Measurement without uncertainly is meaningless', that's all I learned from this lecture.
Thank you very much, Sir!
I am 17 years old Indian student. I have dystonia which restrains me to do many physical activities. I found my love for physics when I was 13 being fascinated by black holes and decided to become a theoretical physicist since then. Currently, I am preparing for JEE 2021 mains not for admitting myself in an engineering college, but just to get a deeper understanding of physics and math. I was hoping if you can give me some career guidance and what should I do further.
I think your lectures are where the concept of physics actually unveils itself.
Love your lectures!
I am in 8th grade right now and I want to become a theoretical physicist so I thought it would be good to learn the topics right now so i finished calculus and started the MIT lectures on classical mechanics. I have been learning from 8.01SC and 8.01x and i really like the way you perform a no. of experiments and demonstrations in your lectures.
Curious?
Crazy 'bout physics?
See every single aspect of life in a different way?
Want to convey your thoughts but do not have the appropriate knowledge to express it on paper?
If you have all these things
You are a theoretical physicist.
All you want is a platform
I think Im gonna top this year because of him, literally I had fallen in love with physics after watching his lectures..
Thank you for inspiring me to learn physics. I'm so glad I was able to find your videos. Lots of love from Mexico
thanks you Racki for your kind words
Don armando? jajajaja
This is a rare vedio of a teacher that we all wants, a fun very good teacher,with a good brain and professional.
Sir, I am in 7th grade(from India), I have been watching your videos for about a year now, and I must say that your videos are absolutely priceless!
All the best
Thanks sir here a jee aspirant who took almost two years to be fully furnished with vectors to electricity you just brought that in few hours..you are a real gem . thanks again sir
Now how you are ?
I learned a very important lesson today, always write down the uncertainties. Uncertainties to physics are like Simpson's paradox to statistics.
Sir thank you so much for providing us with a rather New and intriguing DIMENSION to explore physics. I'm so glad to watch your videos :)
+Soumya Mishra You are welcome :)
The first time I saw your lecture I was at University studying electrical engineering. At that time you help me a lot to really understand physics, now almost 10 years later I've come back to see you again because now I teach physics. Thank you! I'm from Mexico by the way.
Hey!! Can you tell me if these lectures are for Students who are doing bachelors in physics???
Please reply its urgent
@@icsepunjabi2883 8.01 and 8.02 are General Institute Required at MIT - thus all freshman must take them. 8.03 is only required for Physics Majors.
@@lecturesbywalterlewin.they9259 Thank u sir
I am actually a high school student and didnt know much about the syll of bachelors or masters
From an accountant, Your videos are helping me a lot to learn physics :) . Greetings from Egypt.
I'd cordially like to thank you for making me fall in love with physics ❤
:)
Thanks a lot professor. I'm studying by my own schedule, and i'm trying hard to learn physics the best possible way, considering my uncertity of the "measurement" of which one is the best way 'quantitatively' speaking hehe, but / and i can say your lectures are, at least, amazing.
thanks!
"world class" content
I’m 16 (sophomore in high school and homeschooled) and I’m taking physics right now. It’s with a book and while I’m sure it’s a good textbook and workbook I wanted to know more and I think it’s good to learn from multiple “sources” or whatever word you’d like to use. While I don’t plan on becoming a physicist, I do find physics quite interesting (the most interesting branch of science thus far. I still haven’t done chemistry yet though). I’m very grateful for free videos like this. Knowledge is a wonderful thing and it’s amazing when it’s easily accessible
thanks for your kind words
Great great respect to you sir i m studying frm ur vdos after 8 yr , really very helpful everything is crystal clear thank for providing lecture on you tube 🙂🙂🙂
This man is a great teacher.
My love 💕💕💕 im in 9 standard and
Today I found treasure ❤❤❤Walter Lewin sir❤❤❤
If we had a tr like you in every school in india , many students didn't need to go to any special coching for jee exam .
One of the best Physics Lectures I had ever seen. I love how every concept is explained in immense detail and learning has been made accessible to students all across the world..
I swear I’ve learnt this this multiple times at school but never have I appreciated and fell in love w physics more, it’s always been my fav subject but the way you thought it, I swear i didn’t fall asleep once and for once my brain cared more about the experiment then the marks
Hi, I was wondering what book was used throughout this course?
8.01
Physics
Hans C. Ohanian
2nd edition
W.W. Norton & Company
ISBN 0-393-95748-9
8.02
Physics for Scientists & Engineers by Douglas C. Giancoli.
Prentice Hall
ISBN 0-13-021517-1
8.03
Vibrations and Waves by
Anthony French
CRC Press
ISBN 9780748744473
8.03
Electromagnetic Vibrations, Waves and Radiation
by Bekefi and Barrett.
The MIT Press
ISBN 0-262-52047-8
+Lectures by Walter Lewin. They will make you ♥ Physics. ...sir I salute your humble ness 💞💞💞💖💖💖✌👏👏👏👏👏
Lectures by Walter Lewin. They will make you ♥ Physics. Thank you so much for your efforts professor. Are there any good alternatives to Hans ohanian book? It seems hard to get here. My goal is to understand physics and to do research in fluid physics(theoretical). Please provide any directions and I have no problems with math.
sir,can i get these books for free? i cannot afford these books it costs a lot and i also a poor.
cracking pirates you can search for libgen io or libgen rus, it has free collection of books
Notes (don't mind me)
2:58
4:22
6:08
10:47
13:04 [scaling size]
15:00
I am watching these for jee 2022 💓
Believe me it's very helpful and worth your time if you are an aspirant too👍🏼
yes brother, walter lewin's lecture very helpful in preparing for neet/jee
Now if only I could have similar teachers in chemistry too :(
Same here bro 💖
@@ishantsharma7148 For chemistry nucleus hod's are the best you won't regret and you will fall in love with chemistry
Results?
As a retired university psychology professor I started studying physics about 5 years ago on my own. Your wonderful lectures have contributed greatly to my understanding (such as it is) and love of physics. Thank you.
I am 54, didn't do that great at school, BUT wish I'd had a teacher like you, You Sir now have a new subscriber, and I am goin to try and learn more from you, Thank you
Welcome aboard!
I can literally watch these lectures all day since i Don't know but sir ur lectures are so addicting and the plus point is being a neet aspirant here😭
Hey you're preparing for neet 2024??
At the 22:05 the end of femur argument - does this indicate that Galileo's argument is not right and the limiting factor is d/l should be with in certain limited range
yes he was wrong
Who else is wondering where the error was in the argument that d/l is proportional to l? It looked pretty convincing.
The data seem to show that d/l is pretty close to a constant, or put another way that d is proportional to l. One explanation could be that the strength of the bone material varies between species (for example one animal might have a more hollow femur than another). We might also need to consider how the animal moves. For example horses pound the ground quite hard when they gallop at top speed as opposed elephants which don't seem to need to run as fast, so the pressure on the femur is not only proportional to the mass but also to how much the animal accelerates.
@@lecturesbywalterlewin.they9259 Well I assumed that the reason the d/l ratio didn't work out the way we assumed it would is because of the fact that you cannot compare an elephant to a mouse (a (hypothetical) scaled up mouse isn't an elephant by any means. It's just the same size as an elephant. The bone structures, amongst other things would be very different). I'm pretty sure the square-cube law works if you consider the same species. For example, that law says that King Kong cannot exist (apes cannot be that big)
Nice, this forms my favourite time killer AKA high density gravity creator moment. :)
Thank you for the uploads...
First comment on this channel
Excellent lecture of physics.I am a collage student whom studying in Macau University of Science and Technology major in CS.I had to admit that the way of your teaching is very interesting and meaningful ,and this class help me a lot.Thanks for your lecture.
Hello Professor Lewin..! It is 3 and a half years now since I first started 8.01x and completed it, when I was in 11th grade.
I used to take the notion of uncertainties in measurements quite lightly until I came across your lectures. I inculcated the importace of uncertainties and errors.
When I used to include uncertainties in my experiments, in high school, most of my friends who were preparing for even JEE and other competitive entrance exams, at that time, used to say it was a waste of time. But I never stopped including errors in my experiments; I always include them, even now; as Professor said:
"Any measurement without the knowledge of its uncertainty is meaningless." -- also the very first legendary phrase in his book "For the Love of Physics".
And today, after 3 and a half years later, I was able to calculate the coefficient of thermal conductivity of cork with an uncertainty of about 3.5 percent in my university practical exam despite quite unfavourable surrounding conditions. And my measurement was in agreement with the theoretical value as it was "within the uncertainty of the measurements".
Thank you Professor Lewin for all these wonderful videos, course material including problem sets, tests, ....everything.. from all the courses.
These lectures are 24-K gold; or, may I say--whatever Professor Lewin touches turns into Gold. They have made me LOVE Physics!
Thank You Professor Lewin...!!
Thank You for everything sir...!!!
:)
i aint even in uni yet what am i doing here
Braggin'!
I asked myself the same thing
Neither am I.. but I use this stuff daily in my job.... prof Lewin is the best 😊
In India the same thing is taught in 11th grade & I'm in 10th grade ;-)
the right thing
8:05 was hilarious
11:49 famous walter lewin dotted lines
I am a bit confused on calculating uncertainty around 32:44 , how did he get an uncertainty of .008 and not .004? wouldn't the difference be between .783 and .549 resulting in .004?
Ask chatgpt
I know it's 5 months old comment but I am commenting anyway to help other people having the same question. Here is why. The max value of t1/t2 = 1.4262 and min value of t1/t2 is 1.4087 so max - min = 0.0175. Our final answer is something like X +- uncertainty so X is supposed to be in the middle of max and min. So, if you divide max - min by 2, you get 0.00875. Since we set the precision of uncertainty to be 1000th place, you either get +-0.009 or +-0.008 depending on how you round and I think he chose to round down, and that's why the uncertainty is +-0.008.
I am 11 mins into the lecture and i am already falling in love with physics. The subject i dread the most in school.
I have never seen such a beautiful representation of units and measurements. Now, I am trying seeing d/l everywhere. Thank you sir, for helping me observe physics around us. You are a great teacher.
:)
Good god.
the quality of education in the west is NOT proportional to the quality of education in the middle east.
I feel like I have been robbed of a good education ... of the love to know more.
actually this is not what I originally wanted to say:
It's an honour sir to watch you. God bless you.
+Waleed Mohamed it's not just in the middle east or any of the poorer countries really. i went to government school in an oecd country, the quality of education was crap compared to people going to private schools.
political leaders are not really interested providing quality education to the masses. it undermines their position of power if the majority of the population gets a good education instead of a small elite.
now i can see from sources like MIT opencourseware and Khan academy what good quality teaching is.
we're in the same situation in Costa Rica, there's a hugeee difference between public and private education, most scientific carreers are filled with people from private education. I come from public education and I started loving physics not because of my teachers, but because I've always loved the moon and the stars! it's so sad that so many people around the world get stolen the beauty of curiosity and good education
I hope I did not steel your love for the moon and the stars.
haha no, don't worry, I've learned that if you have passion for something, nothing and nobody can steal it from you, it just becomes your everything and what makes you feel alive :D greetings from Costa Rica!
8:32 never knew Adam Sandler studied at MIT
My brother is a big fan of yours, he likes physics because of you and he wanted to become a physicist, but our parents did not allow it, they wanted him to become an engineer because of the higher paying job and he passed JEE. Couldn't pass advance. Due to this stress he commits suicide.Most of the parents in India want their children to become doctors or engineers. They do not give any importance to the passion of children.
very very sad - my thoughs are with you
@@lecturesbywalterlewin.they9259 ❤❤
Sir your lecture starts from the basic then it goes up like stairs that's the best part of your lectures sir.
Very thanks Mr. Lewin for you lectures. These lectures will be a great help for my academy and personal growth. Excuse me for my English, I'm from Colombia and I'm learning English since the beginning of the Covid 19 lockout in my country.
Tomorrow is my history exam. And I am watching this at night.😂😂
UA-cam recommended me after 6 Years🥺
Walter lewin made this course based on ohaninan book. You can get it from fiverr. Search MIT book or ohanian book there you'll find it.
at MIT I used 8.01
Physics
Hans C. Ohanian
Physics
2nd edition
W.W. Norton & Company
ISBN 0-393-95748-9
Yeah thanks I got the book. Searched mit book on FIVERR COM and there it is.
Thanks I can do the problem sets now.
These Lectures Are Awesome Mr. Lewin, I'm just 11 years old and I can understand your lectures as clear as water. Keep making these kinds of lectures Mr. Lewin!
Its crazy that peope there dont know how lucky they are to have this guy as a teacher, thank you for helping ne understand physics
I want to know what Zach is doing these days...
Is he in MIT?
😂😂😂😂
What about the ryder ??
Thanks sir
Sir, are the calculations being done considering the femurs as cubes?
no - I have only assumed that the cross-sectional area of the femur is proportional to d^2.
Ok, got it.. Thanks a lot, sir :)
Sir, in this method of dimensionally equating the two quantities, when we add a constant(after removing the proportionality sign), we take it as a dimensionless constant since our dimensions are already equated.But equations of gravitational force and some others have a constant which have dimensions(planck's constant and G are examples).Why so sir?
I showed you some striking examples of dimensional analysis. I also showed you how you can be fooled by it. In case there are constants that have dimensions, the simplicity stops.
Countless constants in physics have dimensions.
i also wanna know this
I love the way you teach ,sir.
It's a extremely good way to make anyone understand .
You are not one of the best teacher but you are the best teacher.
:)
May your bond grow stronger with each student passing day . Your love for physics is inspiration of today's students. About How Beutiful physics is . And how beautiful your techniques to teach physics ❤
Thanks a lot
Love from PAKISTAN
sir i am preparing for iit jee is it contain all lecture of iit jee ,
Watch all my 94 MIT course lectures. Start with 8.01, then 8.02, then 8.03. Do all the homework and take all my exams. Homework and exams are posted below the video thumb nails. Take 2 full months to do ALL of 8.02, then 3 full months of 8.02 and if you still have time left take 4 months for 8.03. This is a MAJOR commitment. You will have to spend on average every day 2 hours on this - YES EVERY DAY. *I guarantee you that you will then NOT fail your Physics portion of your exam*
so you know about IIT JEE...😊
@@lecturesbywalterlewin.they9259
I wish my teacher was like u
@@lecturesbywalterlewin.they9259 Done. I'll begin today I'm in class 11th already :'(
Sir when you measure the length of the jack you say that uncertainty in your measurement will be +or-0.1cm.
Sir how you decide this uncertainity
IF NO UNCERTANITY VALUE IS GIVEN....IT IS TAKEN TO BE + OR - 0.1 UNITS
Thank you professor for these free lectures. I am a senior high school student about to major in Biology. Your lectures allow me to expand my physics knowledge, as I won’t be able to do so in my major. I will be watching and studying them thoroughly in my free time.
Did you find the book he has recommended??
Woo this is in a totally different scale, the education from United States vs Colombian education, now I see why people say that learn another language is a powerful weapon, thanks for share with us