This website contains all my 94 course lectures (8.01, 8.02 and 8.03) with improved resolution. They also include all my homework problem sets, my exams and the solutions. Also included are lecture notes and 143 short videos in which I discuss basic problems. ENJOY!
I never enjoyed high school until I took physics. Now I found all science fascinating. The problem is when science becomes only about memorizing human given terms it takes the life out of biology the same way walking on a human hamster wheel under artificial light in a cage called a gym takes the life out of going for a walk on a forest trail. We need more Walter Lewin's who demonstrate how amazing things are.
Sir, I found on wikipedia that plasma also has zero electrical resistance. So, it also should behave like a superconductor. Now if someone approaches plasma with a magnet in that case too the magnet will be stopped. Right??
Sir , I'm on my Roof at this Time *Something is looking very Beautiful it's a Bulk of Many stars which is very Difficult to see ( very Low Light ) But It looking like some other Galaxy* , Is it Possible to see some other Galaxy with our Naked Eyes ?? It is at angle nearly 70°-80° to me
>>> It is at angle nearly 70°-80° to me>>> *that's ill-defined. What is the angle above the horizon?* Andromeda Galaxy can be seen with the naked eye but only under extremely clear conditions with no light scattering from nearby cities. You cannot see any globular clusters with naked eye. Thus I do not know what it is. Use google.
ok Sir , it is not possible to record it on Camera So that I can show you , Today that Red Star seems nearly white in color , its 7:50 PM and I will come back to see it at 11:00 PM in night.......
How to get into MIT? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hRp3ND-fBNw.html SAT Scores and GPA (www.prepscholar.com/sat/s/colleges/MIT-SAT-scores-GPA) The average GPA at MIT is 4.13. This makes MIT Extremely Competitive for GPAs. The average SAT score composite at MIT is a 2220 on the old 2400 SAT scale. On the new 1600 SAT, this corresponds to an average SAT score of 1520.
same to me too I am a computer engineer but with a heart door open for science as well.. I just gave it a go to see how is the talking about this but then couldn't stop it till the end!
What an amazing professor! Such fantastic explanations and insight towards practical applications. Professors with this level of passion are very rare!
Lectures by Walter Lewin. They will make you ♥ Physics. If this is truly Walter Lewin, I want to thank you deeply for your methods of teaching. You have inspired me and many of my peers to love physics.. It takes an incredible teacher to inspire such passion in areas such as physics. Sir, you truly are a blessing. I cannot thank you enough for opening my eyes through your lectures. I truly enjoy every minute and wish I could be there sitting in your classes. Thanks again, Cheers.
Great professor indeed! I grew up in Europe and these kind of professors we had at our high schools in the 70's. And not only one but the majority of them were this good. Fast forward to today where you asked to pay exuberant tuition to get this kind if quality in univerities.😑
Lectures by Walter Lewin. They will make you ♥ Physics. ru-vid.com/show-UCiEHVhv0SBMpP75JbzJShqw 300+ videos. Many of them with high resolution. This channel has all my lectures and talks.
i still remember taking the call from from the MIT auditor's office double checking that yes indeed we did buy a blow up love doll from jack's joke shop for a physics class! 😂🤣😂🤣
When I was a student my teachers told my parents I have concentrations problem need a psychologist😅 but now I’m listening! This teacher has magic and power of attraction🤟🏼
I am a computer engineer now, switched from electrical engineering (in my first year uni) just because i did not have a lecturer like this Prof. No concept were explained in electrical engineering in my class, just given, find,.. solution.. my brain becomes a calculator... and it makes electric/physic boring... and worst it makes me understand nothing. I watch this video, so i can learn physics and electric as they are truly my passion. Thank you prof. U re great!
besides making me love physics, i have more appreciation to Biology because of you, Thank You for teaching how the heart works(most physics teacher wont cover)
What do you think on the approach for the “girl levitation experiment “ ... didn’t saw it as world class example to my eyes. Little sad for that. Point beside. Yes he’s good .
It's been a while since I've attended college, and even for someone like me who finds it hard to understand certain things, your methods and word choices have got to be the most clear I have ever heard. As I am following along, every single step makes perfect sense!
At 19:30 the prof. should have said he's going to run a defibrillator's cycle (as a joke). It would be funny seeing the student's heart beat go faster if he got worried a little
Back in 2010 their lectures made me want to go to MIT I could not become the dream come true but my passion for physics grew thanks to that, i hope professio lewin is well
This is what we really call a class, teaching and education. In India we lack this type of intellectual stimulation and what we have here is bookish knowledge. Thankyou Professor, this is my favourite subject and I wish if I was born as your student❤️
I bet if i was your student, the class would have been much more interesting in terms of interaction. I just love physics so much that i can't explain (Though my subject is Biology). All my physics teachers till date are annoyed from me because of my questions😂😂
Professor I have a question... We say when electric current flows through a spring it compresses because of attraction due to magnetic force ... But why do we ignore the fact that there has to be some electrostatic repulsion between the electrons flowing in the spring... As since we know electrostatic repulsion is far greater than magnetic attraction in this case... The string should rather elongate... ( This question was asked in jee and I had a doubt in the answer... The answer was that spring would compress when current flows through it)
Hi professor, I am a medical doctor, and a physics aficionado. The classes are great! thank u for that. Acording to e EKG of the student, is perfectly normal , the p wave is there, you might think is the U wave. Also , its not a typical qRs, but rather a rS complex ( small r , big S wave) that is normal in DI, DII, and maybe AVL and AVF derivative. Had lot of fun watching the whole class. very helpfull for me and my interest. Best regards
I am a retired civil engineer using your very entertaining lectures to brush up on electricity to examine the electric universe hypothesis. I love your passion for physics.
This side effect its low pulse behind the U. You want to know. It's a carrier I have it on my theory field. I like you to make more videos, I watch. Thank you Lewin! Best regards. CA
One of the greatest physics teacher. Anytime I don't understand a concept in PHYSICS I google for Walter Lewin video on it. Thanks a lot sir for your dedication to education and physics in particular. :)
Thanks a lot for the lectures! You made me realize that it's not because I didn't like Physics, but my high school teachers had ruined it for me. I ended up in EE just because electronics had little coverage in the Physics curriculum I had. I wish I had watched your lecture videos 15 years earlier :) By the way, at 11:35 you said there are typically 12 electrodes (ECG). I think you meant there are typically 9 (10 if they do right leg drive to improve common mode rejection). The last 3 leads are mathematically derived, called augmented limb leads. The term 12-lead ecg is very confusing because in EE, leads are physical wire contact points like electrodes as well, not some sort of abstract notion. The medical community must have abused the notation so they can pretend there's a ground lead from the heart when there wasn't physically any.
I love this guys lectures. He knows his stuff. But I can't help but to wonder if anyone else thinks he sounds like the aardvark from the ant and aardvark cartoons?
Cannot stop watching his lecture,his lecture is the best ever and i wish if i could take his lacture for real!!!!! Thank you for uploading this video and again,i really L O V E!!!!!!it!!!!!!
Oh dear. "the sole purpose of the heart is to pump blood???" The Heart Math Institute has discovered it does a lot more, creating the largest magnetic field of any organ in the body and also possesses a "heart-brain" composed of about 40,000 neurons that can sense, feel, learn and remember. Are memories EMFs???
Sir I have a small dought on magnetic levitation that is when an AC current is passed through a coil it levitate on a Conducting plate, if we change the shape of a conducting plate in to a cylinder and then place the coil( in which AC current is passing )in the cylinder will it levitate
When someone asks me what's your goal in life. I just show them present day photo of Dr. Lewin and tell them to do something so that I have this smile and this satisfaction of my face when I will be his age.
Love from India I wanted my physics teacher like you our study system focuses more on bookish language rather than tge practical language like you do in your lectures i watch your all lectures and i am medical student 😇😇😇😇
"2.3.1 Perfect diamagnetism Diamagnetism is due to currents induced in atomic orbitals by an applied magnetic field. The induced currents produce a magnetisation within the diamagnetic material that opposes the applied field, and the magnetisation disappears when the applied field is removed. However, this effect is very small: the magnetisation generally reduces the applied field by less than one part in 105 within the material. In diamagnetic material, B = μμ0H, with the relative permeability μ slightly less than unity.Superconductors take the diamagnetic effect to the extreme, since in a superconductor the field B is zero - the field is completely screened from the interior of the material. Thus the relative permeability of a superconductor is zero."
+Raja Ram Mummadavarapu Google Magentic levitation of trains. Japan just finished their 2nd generation. These trains are not in contact with a rail; they float and the one that was recently finished can go 600 km/hr. That would take 35 min from Boston to NY City. It takes 4 hours with the fastest express US train
Sir in electric dipole if we take a gaussian surface enclosing both the positive and negative charge , the net q(charge) becomes zero. it concludes Electric field is zero outside the gaussian surface.. where am i wrong sir?
It means the electric flux is zero, as Gauss's law says the total electric flux through a closed surface is proportional to the enclosed charge. However, the electric field may indeed not at all be zero. Imagine summing up all the little E dot dA around the surface; some may be negative, some may be positive, and some may be zero, and overall the continuous sum (integral) may add up to zero. But still there is an E.
As far as geometry, it is 100% necessary when building structures etc, a big part of engineering, calculus on the other hand can be used to calculate any projectile (spacecrafts, missiles etc), basically to measure the rate of chance in engineering, economy, physics and other topics.
wut you taking about man look at world around you its all made of math... sequences of events and series of those sequences its all every phenomenon that happens around you is written in the language of math...you just have to change your abstraction(view) of looking at things.
I have always dreamed of becoming physicist but somehow lost interest in physics in my undergrad. But now, after watching all these lectures, i am not sure if i can think of anything other than physics. The way he make us understand the concepts in fun way is mind blowing.
I always say 80 degrees Fahrenheit and 21 degrees Celsius, and 300 degrees Kelvin. I have done that ever since my high school days and I see no need to change that. I will respect anyone who wants to do it the correct way (ha ha ha).
These lectures are immensely helpful! Recently, I’ve interested in physics, but I had trouble finding teachers who really got across to me. This all changed when I happened upon your YT channel. If you were able to put some work/exercises regarding the lecture, or some sources you think are helpful in the description it would be very helpful. Either way, thank you so much! ❤️
@@lecturesbywalterlewin.they9259 Thank you for sharing this. It was very interesting to read this even though I can't yet understand particle colliders and their function. I had heard about CERNs Large Hardons Collider but not about this SSC which would have been 3x longer than CERNs LHC. I have thousand and one questions. 1. So the conductors inside particle colliders are super conductive? For the other questions I shall find answers myself.
I have a question , the structure of a generator is stator and rotor when in rotor has its own coils and stator has its own coils, in rotor coils, its used to rotate and it will born and emf and in coil will pass current , but what are coils in stator used for ?
if the magnets are static then the coil must rotate. rotatng coil will generate an induced EMF (Faraday). The current will go the circuit and through the coil. If the coil can stands still the magnet shoud rotate. An Emf will then be induced in the circuit and the current will again go through the coil. Ask google whether both configurations exist. If ONLY 1 exists most of the time, ask why.
@@lecturesbywalterlewin.they9259 but i still dont get it why there should be coils in stator when the magnetic fiel can be created very well by poles, and from combination of poles and coils around the pole its called excitation circuit just to hard
sir you are a great teacher not like others who just teach physics only for salary or motivate us to only remember the theorems and definitions coming in exam
@6:26 flux doesn't determine the electric field.. For example, take a dipole of +q & -q charge separated by distance d & consider a gaussian surface around it... the enclosed charge will be 0 and the flux will be 0, but the electric field is NOT 0 everywhere. Electric field, E becomes zero only at infinity where the dipole distance d becomes negligible. So, the reason why Flux = 0, but E ≠ 0 is... one side of the gaussian surface has positive flux and on the other side negative flux. Therefore total flux is 0.. but electric field E ≠ 0 everywhere. For example, even at @7:39, the gaussian surface enclosing the HALF depolarised cell will have 0 total enclosed charge... therefore flux = 0 and E field should be 0 by the logic of @6:26 So the reason why (i think) the E field is 0 in one case and not the other is because of the SHAPE of the charge configuration. When it's completely spherical, i think it behaves like a CAPACITOR having E field only in between the concentric plates & 0 everywhere. A capacitor is a SPECIAL dipole which has E field only on the inside. Even in Lec7 @20:23, the professor demonstrates by tearing open a live capacitor and showing the charged plates inside are rolled into concentric circles... So i think this is a circular capacitor like in Lec7.. And when it's halfway depolarised, the perfect circle shape of the capacitor breaks, and we get dipole like field lines near the fringes that's detected outside the heart. (I may be wrong)
