I think he’s a professor at Nottingham University. Brady, who is behind the Periodic Videos channel also has a channel on physics and you can see this guy explaining stuff (same voice)
@@AkamiChannel this isn't the same guy you're thinking of. This guy's name is Bob Eagle. He's not a professor. He's actually a radio host, singer, contributor to the field of physics. Just a jack of all trades, really. He just happens to sound a lot like Dr Mike.
@@heavennoes he does. But he's not a professor. He is more like Brian Mays (I think that's his name) from queen. He has a PhD and has published papers, etc. But has pursued several different career opportunities outside of physics.
I'm really just trying to illustrate the principles here without getting too bogged down in the maths. You could argue that we are talking about a particle having a particular value of K such that K is zero for all values apart from the specific value associated with the particle.
I have been utilizing this channel for many months now in an attempt to better understand the universe around me and I HAVE to say that is the greatest source of information i have ever encountered in regards to truly understand the formalism behind the some of greatest milestones in physics. Im eternally grateful. Thank you.
I agree with you. I'm doing the same. It's a cool feeling when you puzzle a concept out for a while and suddenly it clicks and you all of a sudden "get it." Since I was a little kid I have questioned everything. No explanation was every really good enough lol. It's amazing watching these videos and actually getting a pretty good understanding of the fundamentals of reality INSTEAD of the pretty poor dumbed down explanations one usually gets.
Admittedly, I only completed high school and am now a middle-aged man here in the US and am familiar with basic math but I find learning about physics topics very interesting. This is the third video of yours I’ve watched so far and for me you explain these things very very well and I like that you write it all out and say it in plain terms. Wikipedia helps me a lot. Thanks for making these videos and I’m glad to be a new subscriber of yours in February 2019.
well i think a better way is after you gaduate you take courses in advanced mathmatics and modern mathmatical theorems it can really help you put your thoughts in equasions
DrPhysicsA I agree. My story is weird. I loved physics and architecture - like to draw and resolve. I encountered relativity and said I will never understand it intuitively. I explored the macro to micro sciences with analogies. Then in architecture I heard it for the first time - get outside the box - get uncomfortable - be aware of what you are dealing with. Suddenly the world was full of mystery and we have the power to look for the clues. I carried on with architecture, but that's when I realized that a rotating wave made up the electron (fermion) and explained relativity, etc inherently. Not de Broglie's pilot wave, but matter itself was a manifestation of the rotating wave. I'm a private entrepreneur and proud of it, but I will try to learn everything I can while I'm here. Going over these lectures is a great privilege. One must know the laws in detail in order to ask the right questions. Thanks so much. Bill Christie
Well.. That just changed my life. Just had a nice history lesson from Ernest Rutherford -> Albert Einstein -> Max Planck -> De Broglie -> Werner Heisenberg -> William Hamilton -> Joseph Fourier -> Charles Hermite -> Erwin Schrodinger! Beautiful! I'm so grateful for you sharing this.
I cant thank you enough for these videos...they are really the best on youtube in the way you explain things.... hope you are doing okay and looking forward to new videos
Thank you so much DrPhysics. This is an amazing representation for some one like me [Who has an interest in GUT and particle physics, and general physics to boot] I have never had any opportunity to study this type of thing , so I do so in my own time.[ I dropped out of school thinking it wasnt getting me anywhere] now im 33 and have a keen interest on these topics. People like you help people like me realise thier dreams [and kick themselves for not pursuing university studies, when the opportunity was there]. If any one knows of some where online I can study/ learn particle physics [with a bit more detail, and at a pace I can work through] I would be very appreciative. Again DrPhysics the time and effort you have put into this video [first one of yours i found/ am yet to get to the others] is phenomenal. I really appreciate it
Very strange. I was watching a video on UA-cam in bed. I eventually fell asleep & I guess when the video I was watching ended it somehow went into this one. I awoke in the early hours of the morning 45 minutes into part 2. I had a good couple of hours dream time physics lessons! Even stranger is that I remember the dream comprising entirely of this video's audio. The dream was visualized by a series of parallel washing lines running criss-cross. The washing lines were in rows of 10 & along each line ran a colored square (about 10 cm's across) that represented numbers & moved along in such a way as to illustrate calculations. Weirdest fucking dream I've had a for a long time!! Before going to bed I'd just completed a bottle of red wine. I went for a little lie down as I was feeling a bit worse for ware. 2 hours later I awoke from my dream completely & utterly perplexed but now with a firm grasp of particle physics. Amazing. I wonder what I will dream about tonight?!
This is just great! I'm a computer programmer and my math background is just introductory calculus (and that was a long time ago) but all of this stuff is still very easy to follow. I always wanted to have more detail, see a little more math behind the ideas presented by physicists in popular science talks and this stuff fits the bill perfectly. Thank you so much and please keep up the great work!
Clearly, one of the best lectures on Particle Physics. Before taking a course on physics, it is best to start here to get the foundations right. Thanks, DrPhysicsA
recently had my mind blown when i learned that, strictly speaking, "particles" are not really particles as one might normally envision them and "fields" are not really fields. i still plan to educate myself via your vids, but it is a strange new world for me having learned these things. very excited to have found the "Einstein Field Equations for beginners" vid. being able to push pause at anytime in order to think carefully about what is being said will enable me to get further with physics then if i was sitting in a lecture hall. thanks for the fascinating uploads DrPhysicsA!
This series is a prime of didactics and deepness, for the advanced concepts explained in rational sequence. I shared this video on facebook with my friends ( biomedical researchers in great part ) .Best wishes from Rio.
Great job man ! This is your first video that I am watching but guess I should get back to the QUANTUM MECHANICS ONCEPTS first. But really apreciate your efforts as I am a massive physics enthusiast. Keep up the good work, it is the efforts of passionate people like you that keep us physics enthusiasts' curiosity alive and breathing !!!
Thank you very much, sir, for your passion in teaching these pieces of stuff! It immensely helped me in advancing my physics career and studies! Cheers!
Great teacher! now physics seems really different after listening and watching your lectures... thank you so much may Allah bless you and your entire life and family sir! its such remarkable work you are doing for free... it's like talking classes in Oxford university!
I have studied a little of Quantum Mechanics before, but I found this video of you very good. You explain very well! I'll continue seeing this series of you and other ones too:)
hello professor. Thank you for the very lucid explanations of these concepts. Only the one who knows thoroughly can explain so easily. Einstein I think is supposed to ahve said "if the solution is very simple, god is answering". thanks sir.
most definitely. I don't see why it has to be so complicated. Any concept can be made easier taught. Most people put up a hissy fuss when this is pointed out because usually they're not incentivized to put in the effort to research and refine their presentation. They can afford to put the onus on the student/customer citing laziness, shame, and ego. Those that do and can grasp it via the less intelligible way, don't complain, and in fact boast about it because it becomes a differentiating factor, they can hold it over others, and it's the accepted social climate aligned with the authority figure's preferences. I say fuck that I'll compete teach better, and reward those who do the same in the free market.
gwho You are absolutely right about this. In fact, the situation is worse. Many science academics deliberately treat their subjects as repositories of holy writ to which they have been admitted but which must not admit others. They conceive their job as gatekeepers rather than popularizers , as if passing knowledge on will in some way lessen their own kudos. Typically, they try to mystify the material as much as possibl and talk in impenetrable jargon to help them do this, so we all know who's playing that game. These people should be flagged up, denounced and disincentivized ASAP. And all praise to guys like DrPhysics for going the exact opposite. He is a great teacher, with all the right instincts and a very amicable manner. If anyone should get an OBE it's him.
intentionally obfuscate it, or refuse to teach it simpler, supposedly to filter people out. I mean, i get the Flynn effect is there too, but it's not the only way.
I was really able to absorbe the vast majority of this. There are some formulas and effects that you speed thru and/or reference, but a bit of wikiGoogle'ing has covered those gaps. I am new to your series - breadcrumbing and reverse viewing as per your references - and look forward to rekindling my youthful love of math and physics at the atomic and quantum levels. Thank you so much for all this hard work and tsking the time to articulate. I believe I would have excelled better in my early academics had I found someone to explain these topics as you have. Consuming all of your vidoes will be my goal for this season. Cheers &much respects. Dave.
To whom it may concern. Because of teaching styles if you watch these videos on creation and annihilation operators and then watch professor Susskind's Stanford videos afterwards on introductory particle physics which also talks about the c and a operators they complement each other nicely. Block off 3 to 4 hours of time as i found it better to watch them both around same time.
DrPhysicsA who provide the energy to vacuum? At absolute zero vacuum has absolutely no energy.what is your opinion about QFT, QCD at absolute zero? Will it not breakdown? If it breakdown then how you are so sure about it correctness? Do you know non-relativistic schrodinger quantum mechanics is absolutely correct at any pressure and temperatue?
a- As an operator will take a basic state and annihilate it to create a vacuum. But if that state is in a high energy state then a- will simply reduce its energy state. Similarly a+ will create a basic state from the vacuum or increase the energy level if there is already a state there.
At first I though you were calling him a hat :) After a little research, I now know it's meant to say "hat's off to you with respect." I came here to learn physics and end up learning language. Chapeau!
Thanks for the lecture! Weird that it has only garnered ~1% of likes, when most other presentations are usually at an average of 10% of likes. Must be that most people are afraid of thinking of the physical world from an analytical frame of mind or maybe they think that to "get physics" they have to get it from the "Tree of Knowledge ..."
Thanks for your answer. It will take some head scratching and some books reading before I fully understant it. But I have to say, particule physic is "passionnant" (yes I'm french) especially when explained the way you do in your videos.
Welcome to SimpleScience! Our very new Educational UA-cam Channel. On here you will get to cover all sorts of science topics ranging from Biology, to Chemistry and to Physics in SIMPLE and SHORT and EXTREMELY INFORMATIVE videos from our experts! Please come and watch our channel!
Hello. Thank you very much for excellent videos! Quick question regarding the explanation at 13:24. If the cricket ball is moving at 100m/s, wouldnt the wave length be below the Planck length? And if so, wouldnt it imply that see the ball moving, so the movement which can be measured, but the wavelength is immeasurably small?
Depends where you are at. Go to playlists page and start with playlist for GCSE. That's the basic level. Then do the A level playlist. More advanced. Everything else is pretty much uni level and you can do those in any order, tho best to do QM before Particle Physics.
DrPhysicsA I am in awe of your knowledge. I generally understand the concepts here (e.g. creation and annihilation operators) and the math is a bit sketchy for me in places, BUT, I wish I had the depth of knowledge and recall that you have. Are you writing all of these equations from memory? I'm sure the video follows an outline you thought up before filming but I get the impression that all of the equations and math are just flowing purely from memory. If so, that's amazing.
At 1:04:25 you divided the left side for -(i omega) because it is independent of k but I think dividing the right side for (ik)^2 is not ok at all because it has the sum over k (the sigma term). Can you explain it for me?
this was a mistake -- he should have changed the k^2 -> omega*2m inside the summation sign -- then all would have worked out OK. It seemed to work in the video, but as you noticed it was an accident because you can't just take the k factor outside the summation (or the omega for that matter).
Thank you for uploading it. Very interesting stuff. There is just one thing that is bugging me. In the last part where you obtained the TDSE it seems to me that the more general equation that is satisfied by the field is (in Latex): $ i^{m-n}\frac{d^{n}\Psi}{dt^{n}}=(-\frac{\hbar}{2m})^{n}k^{2n-m}\frac{d^{m}\Psi}{dx^{m}} $. Taken this into account, TDSE is the special case when m=2 and n=1, and the choice of m and n (the order of the derivatives in space and time, respectively) seems quite arbitrary. This choice could perhaps be linked to the dispersion relation.
Basically each photon interacts with an electron. If the photon provides enough energy to the electrons to overcome the work function then the electron is ejected from the metal surface and the rest of the energy which is left after overcoming the work function is then converted to Kinetic energy.
What physical meaning the imaginary term isin(kx -wt) has in the expansion , e^i(kx - wt) -..........-(I)? The wave represented by (I) is a cosine wave only, right? Or the sine part has to do anything with this? I am extremely confused on what is the role of imaginary terms in waves as well as in Currents.
If the time evolution of a wave psi(x) would be written as: psi(x,t)=psi(x) cos(wt), then at certain times t the wave function would collapse completely and the particle would be gone (consider wt = pi/2, 3/2 pi, etc). Writing a wave like e^(iwt) would make sure that |psi(x,t)|^2 = |psi(x)|^2 at all times t.
+DrPhysicsA 57:31 - how did you conclude that psi-dagger was 'sum a+ ...' . I've watched the QM concepts vids and took notes but can't remember going over this. This stuff is far ahead of my current physics knowledge but I'm seeming to follow the vids quite well, i can do the maths I'm just not sure how you got an equation for psi-dagger and also psi(x) [the second one]. Thanks!
This is the greatest "non-proffesional" lecture to particle physics I have ever seen. Great work!
Seems quite professional to me.
I think he’s a professor at Nottingham University. Brady, who is behind the Periodic Videos channel also has a channel on physics and you can see this guy explaining stuff (same voice)
@@AkamiChannel this isn't the same guy you're thinking of. This guy's name is Bob Eagle. He's not a professor. He's actually a radio host, singer, contributor to the field of physics. Just a jack of all trades, really. He just happens to sound a lot like Dr Mike.
@@Quantum- I thought he had a doctorate in nuclear physics at king college?
@@heavennoes he does. But he's not a professor. He is more like Brian Mays (I think that's his name) from queen. He has a PhD and has published papers, etc. But has pursued several different career opportunities outside of physics.
I'm really just trying to illustrate the principles here without getting too bogged down in the maths. You could argue that we are talking about a particle having a particular value of K such that K is zero for all values apart from the specific value associated with the particle.
I have been utilizing this channel for many months now in an attempt to better understand the universe around me and I HAVE to say that is the greatest source of information i have ever encountered in regards to truly understand the formalism behind the some of greatest milestones in physics. Im eternally grateful. Thank you.
I agree with you. I'm doing the same. It's a cool feeling when you puzzle a concept out for a while and suddenly it clicks and you all of a sudden "get it." Since I was a little kid I have questioned everything. No explanation was every really good enough lol. It's amazing watching these videos and actually getting a pretty good understanding of the fundamentals of reality INSTEAD of the pretty poor dumbed down explanations one usually gets.
Geronimo Cornplante
agreed!
lolz
Jupiter he´s just trying to tell us how small an antifa´s brain is.
This stuff is ridiculously simple. You're a very good teacher.
Don't shrink his head's wavelength.
Admittedly, I only completed high school and am now a middle-aged man here in the US and am familiar with basic math but I find learning about physics topics very interesting. This is the third video of yours I’ve watched so far and for me you explain these things very very well and I like that you write it all out and say it in plain terms. Wikipedia helps me a lot. Thanks for making these videos and I’m glad to be a new subscriber of yours in February 2019.
Best route to become theoretical physicist, get initial degree and post-graduate degree and then seek a university research post.
What if we just want to learn about particle physics for fun?
Silas Panelo Sadia Like most things, the jobs are highly competitive.
Silas Panelo Sadia But I don't want to be a theoretical physicist.
well i think a better way is after you gaduate you take courses in advanced mathmatics and modern mathmatical theorems it can really help you put your thoughts in equasions
DrPhysicsA I agree. My story is weird. I loved physics and architecture - like to draw and resolve. I encountered relativity and said I will never understand it intuitively. I explored the macro to micro sciences with analogies. Then in architecture I heard it for the first time - get outside the box - get uncomfortable - be aware of what you are dealing with. Suddenly the world was full of mystery and we have the power to look for the clues. I carried on with architecture, but that's when I realized that a rotating wave made up the electron (fermion) and explained relativity, etc inherently. Not de Broglie's pilot wave, but matter itself was a manifestation of the rotating wave. I'm a private entrepreneur and proud of it, but I will try to learn everything I can while I'm here. Going over these lectures is a great privilege. One must know the laws in detail in order to ask the right questions. Thanks so much. Bill Christie
Well.. That just changed my life.
Just had a nice history lesson from
Ernest Rutherford ->
Albert Einstein ->
Max Planck ->
De Broglie ->
Werner Heisenberg ->
William Hamilton ->
Joseph Fourier ->
Charles Hermite ->
Erwin Schrodinger!
Beautiful! I'm so grateful for you sharing this.
I cant thank you enough for these videos...they are really the best on youtube in the way you explain things.... hope you are doing okay and looking forward to new videos
Thank you so much DrPhysics. This is an amazing representation for some one like me [Who has an interest in GUT and particle physics, and general physics to boot]
I have never had any opportunity to study this type of thing , so I do so in my own time.[ I dropped out of school thinking it wasnt getting me anywhere] now im 33 and have a keen interest on these topics. People like you help people like me realise thier dreams [and kick themselves for not pursuing university studies, when the opportunity was there]. If any one knows of some where online I can study/ learn particle physics [with a bit more detail, and at a pace I can work through] I would be very appreciative.
Again DrPhysics the time and effort you have put into this video [first one of yours i found/ am yet to get to the others] is phenomenal. I really appreciate it
OMG i recently found your channel and I love it! You explain everything so well.
Keep watching this series. It will appear in a later video.
Very strange. I was watching a video on UA-cam in bed. I eventually fell asleep & I guess when the video I was watching ended it somehow went into this one. I awoke in the early hours of the morning 45 minutes into part 2. I had a good couple of hours dream time physics lessons! Even stranger is that I remember the dream comprising entirely of this video's audio. The dream was visualized by a series of parallel washing lines running criss-cross. The washing lines were in rows of 10 & along each line ran a colored square (about 10 cm's across) that represented numbers & moved along in such a way as to illustrate calculations. Weirdest fucking dream I've had a for a long time!! Before going to bed I'd just completed a bottle of red wine. I went for a little lie down as I was feeling a bit worse for ware. 2 hours later I awoke from my dream completely & utterly perplexed but now with a firm grasp of particle physics. Amazing. I wonder what I will dream about tonight?!
Dogboy73 I
Well, as long as no-one's watching you, an interference pattern. :D
Yeah dont believe a word of that.nice story tho.maybe tonight you will dream up another fake story
Completed a bottle of wine. Really, completed. Hahahahahahahah
You are so great you made me understand quantum field theory. Amazing! Keep doing what you're doing.
This is just great! I'm a computer programmer and my math background is just introductory calculus (and that was a long time ago) but all of this stuff is still very easy to follow. I always wanted to have more detail, see a little more math behind the ideas presented by physicists in popular science talks and this stuff fits the bill perfectly.
Thank you so much and please keep up the great work!
Clearly, one of the best lectures on Particle Physics. Before taking a course on physics, it is best to start here to get the foundations right. Thanks, DrPhysicsA
recently had my mind blown when i learned that, strictly speaking, "particles" are not really particles as one might normally envision them and "fields" are not really fields. i still plan to educate myself via your vids, but it is a strange new world for me having learned these things.
very excited to have found the "Einstein Field Equations for beginners" vid. being able to push pause at anytime in order to think carefully about what is being said will enable me to get further with physics then if i was sitting in a lecture hall. thanks for the fascinating uploads DrPhysicsA!
awesome. best yet. !! every dark cloud is going away and FINALLY seeing the gist of the whole matter...thanks to YOU. ..greatly appreciated.....!!
Your pronunciation is charming! I love it !
Wow I almost understood some of that. Thank you so much for this delicious presentation; equations so sweet you can almost taste them. Yum!
i wish I had a tutor like this - HE IS GOOD!!!
This series is a prime of didactics and deepness, for the advanced concepts explained in rational sequence. I shared this video on facebook with my friends ( biomedical researchers in great part ) .Best wishes from Rio.
And yet another EXCELLENT video. Thank you! You have a unique skill in lecturing/teaching. No wonder you've got hundreds of thousands of "views".
Great job man !
This is your first video that I am watching but guess I should get back to the QUANTUM MECHANICS ONCEPTS first.
But really apreciate your efforts as I am a massive physics enthusiast.
Keep up the good work, it is the efforts of passionate people like you that keep us physics enthusiasts' curiosity alive and breathing !!!
I love this, thank you and please don't stop.
Jim Dogma has kindly responded. I'll just add that this is consequence of taking the derivative of an exponential. So d/dt of e^iwt = iw e^iwt
Thank you very much, sir, for your passion in teaching these pieces of stuff! It immensely helped me in advancing my physics career and studies! Cheers!
U r best. I am a physics lover who never made it to actually becoming a scientist. I salute your passion and effort. Keep it up.
This video is wonderful! It closes a the gaps I didn't understand in other introductions.
Great teacher! now physics seems really different after listening and watching your lectures...
thank you so much may Allah bless you and your entire life and family sir!
its such remarkable work you are doing for free... it's like talking classes in Oxford university!
You are a wonderful teacher. I think I understand most of the content as a high school student. I will definitely watch all of your videos.
Did this at a party last week. Huge hit. Thanks.
I have studied a little of Quantum Mechanics before, but I found this video of you very good. You explain very well!
I'll continue seeing this series of you and other ones too:)
Dr.Physics...Chapeau! Your channel conveys the profound knowledge of Natural Philosophy in a simple and efficient manner. Keep it up! :)
I think I finally found a perfect channel to help me pursue physics
hello professor. Thank you for the very lucid explanations of these concepts. Only the one who knows thoroughly can explain so easily. Einstein I think is supposed to ahve said "if the solution is very simple, god is answering". thanks sir.
your lectures are simpler than leonard susskinds lectures great job Sir
most definitely. I don't see why it has to be so complicated. Any concept can be made easier taught. Most people put up a hissy fuss when this is pointed out because usually they're not incentivized to put in the effort to research and refine their presentation. They can afford to put the onus on the student/customer citing laziness, shame, and ego. Those that do and can grasp it via the less intelligible way, don't complain, and in fact boast about it because it becomes a differentiating factor, they can hold it over others, and it's the accepted social climate aligned with the authority figure's preferences.
I say fuck that I'll compete teach better, and reward those who do the same in the free market.
gwho You are absolutely right about this. In fact, the situation is worse. Many science academics deliberately treat their subjects as repositories of holy writ to which they have been admitted but which must not admit others. They conceive their job as gatekeepers rather than popularizers , as if passing knowledge on will in some way lessen their own kudos. Typically, they try to mystify the material as much as possibl and talk in impenetrable jargon to help them do this, so we all know who's playing that game. These people should be flagged up, denounced and disincentivized ASAP. And all praise to guys like DrPhysics for going the exact opposite. He is a great teacher, with all the right instincts and a very amicable manner. If anyone should get an OBE it's him.
intentionally obfuscate it, or refuse to teach it simpler, supposedly to filter people out.
I mean, i get the Flynn effect is there too, but it's not the only way.
susskind is harder, more compressed, it is just a higher level and not for beginners.
Global Digital Direct Subsidiarity Democracy yes and no. Some of the subjects are a bit deeper but they are over complicated in my opinion.
Oldie but goldie! Derivation of TDSE was brilliant.
There is so much information on UA-cam. You can literally learn anything if you want
This serves as a really smooth introduction to QFT! Thank you!
I started to read a book about QFT but it got really overwhelming pretty quickly...
"QFT for the Gifted Amateur" seems to be a relatively slow and steady one. Although you posted this 6 years ago so you probably got that covered lol
Wonderfully concise. Barely a word wasted.
Aspiring high school student here. Thanks a lot for the comprehensive introduction. Will be aiming to base my career in this extraordinary field.
I was really able to absorbe the vast majority of this. There are some formulas and effects that you speed thru and/or reference, but a bit of wikiGoogle'ing has covered those gaps.
I am new to your series - breadcrumbing and reverse viewing as per your references - and look forward to rekindling my youthful love of math and physics at the atomic and quantum levels. Thank you so much for all this hard work and tsking the time to articulate. I believe I would have excelled better in my early academics had I found someone to explain these topics as you have.
Consuming all of your vidoes will be my goal for this season.
Cheers &much respects.
Dave.
sir, your videos helps me very much on my studies on quantum mechanics!! thanks so much!
Very interesting and can open eyes in sight of Particle physics
i am understanding it ,step by step ! please carry on !
Awesome channel, this is the best channel for physics.
incredible how much can be explained with a felt tip pen and voice
it's very well done, thank you for all your works
Thanks for the great lecture...if only all professors taught their classes at this level...
Im just starting physics but I absolutely understand everything!!
ik, I'm 10 and he is the only person / Ytuber the explains it properly!
This really helps explain the integer values in those equations.
Thank you soo much. I love your lectures.
Best teacher ever. Thank you
very strait forward explanation...thank u!
To whom it may concern. Because of teaching styles if you watch these videos on creation and annihilation operators and then watch professor Susskind's Stanford videos afterwards on introductory particle physics which also talks about the c and a operators they complement each other nicely. Block off 3 to 4 hours of time as i found it better to watch them both around same time.
I enjoy so kuch with your videos..!
You are the only God I believe in, sir. You are absolutely amazing. I wish I could ever have your intelligence. Thank you so much for these videos.
this is why theoretical physicists are either in school or retired. i thank goodness for them...
Thanks for this. Well put.
Neither. This is simply saying that the more energy you borrow from the vacuum the quicker you have to repay it.
DrPhysicsA who provide the energy to vacuum? At absolute zero vacuum has absolutely no energy.what is your opinion about QFT, QCD at absolute zero? Will it not breakdown? If it breakdown then how you are so sure about it correctness? Do you know non-relativistic schrodinger quantum mechanics is absolutely correct at any pressure and temperatue?
great video. great pace.
a- As an operator will take a basic state and annihilate it to create a vacuum. But if that state is in a high energy state then a- will simply reduce its energy state. Similarly a+ will create a basic state from the vacuum or increase the energy level if there is already a state there.
At first I though you were calling him a hat :) After a little research, I now know it's meant to say "hat's off to you with respect."
I came here to learn physics and end up learning language. Chapeau!
this is blowing my mind. I'm almost certain to go into particle physics now!
Shall I also study nuclear physics as well since they seem related?
Very easy to understand, yet advanced.
Great lesson, thank you.
Thanks for the lecture!
Weird that it has only garnered ~1% of likes, when most other presentations are usually at an average of 10% of likes.
Must be that most people are afraid of thinking of the physical world from an analytical frame of mind or maybe they think that to "get physics" they have to get it from the "Tree of Knowledge ..."
So educational!!! Even understandable to me!!!
This man is a prophet of mathematics
Well you must be right :-)
I'll keep on scratching my head understanding why :-)
What exam board are you doing? What issues would you want covered?
I want the mathematics of string theory covered.
this is old school teaching and i loveit thank you
Thanks for your answer.
It will take some head scratching and some books reading before I fully understant it.
But I have to say, particule physic is "passionnant" (yes I'm french) especially when explained the way you do in your videos.
Thanks for sharing!!!
Excellent work
Welcome to SimpleScience! Our very new Educational UA-cam Channel. On here you will get to cover all sorts of science topics ranging from Biology, to Chemistry and to Physics in SIMPLE and SHORT and EXTREMELY INFORMATIVE videos from our experts! Please come and watch our channel!
Very nice lecture thank you. Very well done.
Hello. Thank you very much for excellent videos! Quick question regarding the explanation at 13:24. If the cricket ball is moving at 100m/s, wouldnt the wave length be below the Planck length? And if so, wouldnt it imply that see the ball moving, so the movement which can be measured, but the wavelength is immeasurably small?
Very good!
So brilliant
Excellent class, thanks a lot.
Excellent lecture.
Nice explanation@love from India
I enjoy this, many thank you's.
Yo bro
Great explanation.
Thanks for using the paper again! ;)
This is awesome! However if you could tell me what video series I should start with to understand everything, that'd be great
Depends where you are at. Go to playlists page and start with playlist for GCSE. That's the basic level. Then do the A level playlist. More advanced. Everything else is pretty much uni level and you can do those in any order, tho best to do QM before Particle Physics.
thank you :)
I use a panasonic SDR S26 camera mounted on a normal camera tripod and pointing vertically down.
DrPhysicsA I am in awe of your knowledge. I generally understand the concepts here (e.g. creation and annihilation operators) and the math is a bit sketchy for me in places, BUT, I wish I had the depth of knowledge and recall that you have. Are you writing all of these equations from memory? I'm sure the video follows an outline you thought up before filming but I get the impression that all of the equations and math are just flowing purely from memory. If so, that's amazing.
I understand nothing :).... but I really like your accent. Great job, man!!
At 1:04:25 you divided the left side for -(i omega) because it is independent of k but I think dividing the right side for (ik)^2 is not ok at all because it has the sum over k (the sigma term). Can you explain it for me?
this was a mistake -- he should have changed the k^2 -> omega*2m inside the summation sign -- then all would have worked out OK. It seemed to work in the video, but as you noticed it was an accident because you can't just take the k factor outside the summation (or the omega for that matter).
Thank you for uploading it. Very interesting stuff. There is just one thing that is bugging me. In the last part where you obtained the TDSE it seems to me that the more general equation that is satisfied by the field is (in Latex):
$ i^{m-n}\frac{d^{n}\Psi}{dt^{n}}=(-\frac{\hbar}{2m})^{n}k^{2n-m}\frac{d^{m}\Psi}{dx^{m}} $.
Taken this into account, TDSE is the special case when m=2 and n=1, and the choice of m and n (the order of the derivatives in space and time, respectively) seems quite arbitrary. This choice could perhaps be linked to the dispersion relation.
The photoelectric effect hypothesizes photons, in the double-slit experiment we observe the discrete points of light, hence particle-wave duality.
Basically each photon interacts with an electron. If the photon provides enough energy to the electrons to overcome the work function then the electron is ejected from the metal surface and the rest of the energy which is left after overcoming the work function is then converted to Kinetic energy.
great video. thank you for doing this. could you help us in understanding the basics of AdS/CFT correspondence principle ?
don't say even I dr. :))
you are just as brilliant as the people you are talking about !!
OMG, is this man a teaching genius, or what? OMG OMG OMG !!!!!!!!!
What physical meaning the imaginary term isin(kx -wt) has in the expansion , e^i(kx - wt) -..........-(I)?
The wave represented by (I) is a cosine wave only, right? Or the sine part has to do anything with this?
I am extremely confused on what is the role of imaginary terms in waves as well as in Currents.
If the time evolution of a wave psi(x) would be written as: psi(x,t)=psi(x) cos(wt), then at certain times t the wave function would collapse completely and the particle would be gone (consider wt = pi/2, 3/2 pi, etc). Writing a wave like e^(iwt) would make sure that |psi(x,t)|^2 = |psi(x)|^2 at all times t.
Excellent
+DrPhysicsA
57:31 - how did you conclude that psi-dagger was 'sum a+ ...' . I've watched the QM concepts vids and took notes but can't remember going over this. This stuff is far ahead of my current physics knowledge but I'm seeming to follow the vids quite well, i can do the maths I'm just not sure how you got an equation for psi-dagger and also psi(x) [the second one]. Thanks!