I’ve thought occasionally about Maxwell’s equations ever since my first lecture on them over forty years ago. Now that I have watched this video 4 times, I finally get all the subtleties I was missing all those years, and I can get those fifty points. Thank you Dr Durgin!
Unless you have dealt with applications of Maxwell’s equations before, you need a geometric illustration of the equations. There is nothing wrong with slowing down and drawing diagrams for scenarios that represent the equations and relating them to the mathematical notations used. Basic definition of flux, curl and divergence and how they fit into the physics of electromagnetism are fun but could be challenging to those who lack adequate exposure to the subject, in particular when different mathematical forms are used to express the same physics.
#101,739 in the longest continuing series in all of education: Visual Studies of the Back of the Human Head, Writing on a Black or White Board Subspecialty.
I may be a tard but even I know that those 4 'Maxwell's Equations' are actually Oliver Heaviside's interpretations of Maxwell's original 20 equations of electromagnetism.
Hello, Dr. Gregory Durgin! My name is Alfredo, and it's a big pleasure to watch your nice videos about teaching in pleasurable way. Hence I resort to you by reason of learning the right way to work with some differential opertator as gradient, del, divergence, del dot, quabla, and quabla dot operators, by virtue of learning much better the relativistic Maxwell's equations. I assert that I've found a difference between them when they are applied to tensor fields. So I underscore the following summary which was composed by myself, wishing you can absolve my query. s28.postimg.org/6f7g8abx8/tensor_calculus_q.jpg Thus I'll be looking forward to your reply as soon as possible. Regards from Peru!
Just re-visited this video for ONE reason: Greg's quip about "How do you explain this to a person who doesn't understand science - like an Industrial Engineer?" My son was studying Industrial Engineering at the time, and when I shared this video with him, we roared with laughter! THAT was a good one! However, just to give some perspective: At my son's university, the first two years was common with the Mechanicals and Aeronauticals. So the guys had a reasonably strong physics and mechanics background - although I am not sure how deeply they would have covered Maxwell's equations!? Anyway, there is nothing like a good sense of humour!
You called H amps per meter. Why is Ampere’s Law so often written with your H replaced with B? Does not H represent the magnetic field intensity measured in amps per meter and B represent the magnetic flux density measured in Tesla’s? I find it confusing when one is conflated with the other. Please explain. I’ve not seen E, the electric field intensity, conflated with D, the electric flux density.
yes, conductive and displacement current should be the same in the circuit level. One has uniform conductivity while another is field variation or electric flux density variation related.
Today's scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality. ~Nicola Tesla
Michael Harrell , In a way this is true, but of course Maxwell didn’t carry it that far because he didn’t know how fusion can create a helium from immense compaction of hydrogen atoms.
Whiteboykun yes I realise that. You can rewind youtube, once lectures are uploaded they dont need to be re-done. youtube is free. Some lecturers are brilliant dont get me wrong but in 2015 university is all business and no longer a necessity
Captain Rhodes UA-cam is not free, with all the data mining google performs on your searches, views, likes, saved videos, and then the ads you view (or don't view) through all of google's services.... and academia is a business and a necessity. I'd take someone from a uni any day of the week over someone who sat there and watched every youtube video/kahn academy lecture start to finish. academic rigor builds a nation of thinkers.
Whiteboykun well theres the problem. you automatically assume that people at uni know more. I went to uni. My lab technicians there hadnt been yet they knew way more than us and spent most of the time taking the piss out of the students. It doesnt matter where you learn. all that matters is what you can do with it. Uni is very 20th century, from the days when people had to go there for the information. now its basically pointless. It is necessary in the sense that the perception of a 'degree' trumps someone who simply claims to know their stuff, so on that basis it still has value - IE to tick the box of an archaic system so you can get an interview, but its still pointless when you strip away all the prejudice.
Captain Rhodes I never said they knew more, not once. And again, academic rigor builds character. You seem to have a hard time taking in information. I'd rather take into my company a student that sweated for years in an accredited university, struggling to meet deadlines and competing/cooperating with others in his/her field. Not someone that, for all I know, sat there watching youtube videos for their entire understanding of a topic. So what if they have a requisite understanding of the material? I'm not gonna exhaust my applicant search by researching their self-described credentials when a university degree tells me all I need to know (or at least, enough) to consider hiring them.
"How would you explain this to someone who doesn't understand science....say an industrial engineer?" That was gold!
UA-cam GIVES ME A FRONT ROW SEAT !!!
I’ve thought occasionally about Maxwell’s equations ever since my first lecture on them over forty years ago. Now that I have watched this video 4 times, I finally get all the subtleties I was missing all those years, and I can get those fifty points. Thank you Dr Durgin!
3 Industrial engineers did not enjoy this video
Whats wrong with industrial engeneers ? :D
@@AsakuraDantes Most probably they can not build electric motors with pure B.S.
30 years ago,these superteacher have made my engineer degree more easy and plentifull....
Maxwells equations are actually Heaviside equations.
This is a great qualitative discussion of Maxwell's Equations. It helped to clear up the "Mathiness" from my Electricity and Magnetism Class.
Unless you have dealt with applications of Maxwell’s equations before, you need a geometric illustration of the equations. There is nothing wrong with slowing down and drawing diagrams for scenarios that represent the equations and relating them to the mathematical notations used. Basic definition of flux, curl and divergence and how they fit into the physics of electromagnetism are fun but could be challenging to those who lack adequate exposure to the subject, in particular when different mathematical forms are used to express the same physics.
starts on positive ends on negative, just like life ;)
What made Maxwell realize he was done? How did he come to understand he only needed 4 equations?
Greg, every upload in your channel I am interested in. Thank you very much for your videos.
#101,739 in the longest continuing series in all of education: Visual Studies of the Back of the Human Head, Writing on a Black or White Board Subspecialty.
Still doesn’t relate to Maxwell’s silver hammer.
Oh... and Hertz proved the existence of EM waves, not Marconi who stole 17 of Nikola Tesla's patents for 'his' transatlantic radio system.
Citation?
nothing better than cold, hard science... except when you combine it with edible thc...
More teachers like him are needed
He is not a teacher, he is a lecturer. He has made a huge number of assumptions that teachers cannot ever do.
I love that teacher. I would like to have him as a buddy, who you can ask your questions.
Thanks to Maxwell we now know why the sky is Blue - and he did all this without digital calculators and personal computers!
No shit, this is the best lecture by far on this topic, these students should be grateful
This is perfect. Great teacher
Didn't Hertz actually demonstrate radio waves before Marconi ? You make the lecture interesting and the explanations help a lot.
I may be a tard but even I know that those 4 'Maxwell's Equations' are actually Oliver Heaviside's interpretations of Maxwell's original 20 equations of electromagnetism.
Thanks for pointing out this fact . en.m.wikipedia.org/wiki/Oliver_Heaviside. A forgotten hero .
I like this prof, he seems like he knows what he's talking about. I wish I could take some of these courses taught by him.
Watch his video just because of Sir Ashraf Iqbal ❤
Hello, Dr. Gregory Durgin!
My name is Alfredo, and it's a big pleasure to watch your nice videos about teaching in pleasurable way. Hence I resort to you by reason of learning the right way to work with some differential opertator as gradient, del, divergence, del dot, quabla, and quabla dot operators, by virtue of learning much better the relativistic Maxwell's equations. I assert that I've found a difference between them when they are applied to tensor fields. So I underscore the following summary which was composed by myself, wishing you can absolve my query.
s28.postimg.org/6f7g8abx8/tensor_calculus_q.jpg
Thus I'll be looking forward to your reply as soon as possible.
Regards from Peru!
Just re-visited this video for ONE reason: Greg's quip about "How do you explain this to a person who doesn't understand science - like an Industrial Engineer?" My son was studying Industrial Engineering at the time, and when I shared this video with him, we roared with laughter! THAT was a good one! However, just to give some perspective: At my son's university, the first two years was common with the Mechanicals and Aeronauticals. So the guys had a reasonably strong physics and mechanics background - although I am not sure how deeply they would have covered Maxwell's equations!? Anyway, there is nothing like a good sense of humour!
Great illustration of a sometimes confusing topic
You called H amps per meter. Why is Ampere’s Law so often written with your H replaced with B?
Does not H represent the magnetic field intensity measured in amps per meter and B represent the magnetic flux density measured in Tesla’s? I find it confusing when one is conflated with the other. Please explain. I’ve not seen E, the electric field intensity, conflated with D, the electric flux density.
Can I get back to you on that?
😂👍🏻 wonderful lecture thank you❤✌🏻
That dude who starts talking about it being blood flowing through the veins has been blazing through the Physics 420 course book
A VERY useful presentation.
yes, conductive and displacement current should be the same in the circuit level. One has uniform conductivity while another is field variation or electric flux density variation related.
JC Bose showed millimeter-wave radio before Marconi to the Royal Society.
Excellent explaination in calm way. Great Greg Durgin
Shlomi Zigdon
Wonderful ! Thank you so much
Really helpful ;) Thanks a lot !
So nice and educative sir
Memorise? Seriously? This is physics?
Sir , I wanna thank you for clearing my doubt that i had for a long time, thank you.
Excellent explaination
I downloaded this. Maxwell House coffee is my choice
excellent lecture as usual. i love the last minute of the whole lecture. that remark is short but explosive like a nuclear chain reaction. haha
Thank you for sharing
When do we use the differential form of Maxwell's eqn and when to use the integral form?
Salute from India sir g
Today's scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality.
~Nicola Tesla
The experiments confirming the math speak for themselves lol
great lecture
Yah know dis is how stars are formed and with them galaxies all matter and all life. Yes?
Michael Harrell , In a way this is true, but of course Maxwell didn’t carry it that far because he didn’t know how fusion can create a helium from immense compaction of hydrogen atoms.
truly gratifying
great lecture
thx for vid, keeps le brain ticking over the holidays. can't wait to go over this when i start the new year
UA-cam>>>>>University
+Captain Rhodes You realize this is a youtube video OF HUMAN BEINGS IN A UNIVERSITY right?
Whiteboykun yes I realise that. You can rewind youtube, once lectures are uploaded they dont need to be re-done. youtube is free. Some lecturers are brilliant dont get me wrong but in 2015 university is all business and no longer a necessity
Captain Rhodes UA-cam is not free, with all the data mining google performs on your searches, views, likes, saved videos, and then the ads you view (or don't view) through all of google's services.... and academia is a business and a necessity. I'd take someone from a uni any day of the week over someone who sat there and watched every youtube video/kahn academy lecture start to finish. academic rigor builds a nation of thinkers.
Whiteboykun well theres the problem. you automatically assume that people at uni know more. I went to uni. My lab technicians there hadnt been yet they knew way more than us and spent most of the time taking the piss out of the students. It doesnt matter where you learn. all that matters is what you can do with it. Uni is very 20th century, from the days when people had to go there for the information. now its basically pointless. It is necessary in the sense that the perception of a 'degree' trumps someone who simply claims to know their stuff, so on that basis it still has value - IE to tick the box of an archaic system so you can get an interview, but its still pointless when you strip away all the prejudice.
Captain Rhodes I never said they knew more, not once. And again, academic rigor builds character. You seem to have a hard time taking in information. I'd rather take into my company a student that sweated for years in an accredited university, struggling to meet deadlines and competing/cooperating with others in his/her field. Not someone that, for all I know, sat there watching youtube videos for their entire understanding of a topic. So what if they have a requisite understanding of the material? I'm not gonna exhaust my applicant search by researching their self-described credentials when a university degree tells me all I need to know (or at least, enough) to consider hiring them.
In my opinion the greatest scientist that ever lived .
@anthonybardsley4985
Einstein's opinion ditto.
Time to walk out of this classroom
buy college i mean 17-19 education, here in le u.k
I wish i have a teacher like him
he makes you love what you study
+Islam Freihat a good wish
sir, can em waves be ever static in nature?
Holy flap, this is awesome, the capacitor problem was so beautifully explained! Best teacher ever!
I like the Word Form at 37:44
Just like electric field.
lively classsssss.........
cool teacher !!
Thanks
Thanks
Awesome
science
beautiful
best
Great explanations. Thank you 😊 teacher.
u are grea gregory.
Why is this video labeled under the vehicles and automotive category?? Amazing lecture by the way! I'm really glad I found this.
Greg Durgin is a great story teller, thanks for sharing your lectures.
3 Chinese students in front row and 1 in the second at Georgia tech.
It's like jim Carrey died and got reincarnated as a university professor
notation, oh god
I'm 40 and learning. Thanks.