8.02x - Lect 13 - Moving charges in B-fields, Cyclotrons, Mass Spectrometers, LHC 

Dear Dr. Lewin, Due to these lectures I have finally achieved my dream of becoming a plasma physicist. I just finished my internship at the french tokamak and at ITER and now I am applying for a Phd. You are one among some of the people who transformed my life and I thank you with all my heart.

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!

Edupoint suggested me to see ur lecture ..so I came here...really ur explanation is amazing..like it ....love frm India ❤❤❤

Dr. Lewin, Thank you so much for putting these lecture videos together. You are an inspiration to young physicists the world over. At least you are to me, sir.

I gotta admit it, these lectures are just a golden ore of information, they helped me understand more things then I could do on my own in 2 years. Also, they are the embodiment of how physics should be done.

Sir you are THE BEST TEACHER I've ever seen. Nobody ever will be able to teach physics like you.

8:11 when he said special relativity....i thought he is not going to explain it but when he said that he'll touch upon that topic i was like -"thank god....for the least there is someone who thinks out of the course"!... great job sir!

I wish I would have had such brilliant teachers when I did my physics courses at university. Thank you very much to open up your lectures on this platform to a wide audience.

You are the best physics professor I have ever seen...

Professeur Lewin's Amazing Dialogue 32:53 ; Absolute Class !! "Let's Go back to 2002 :D "

Your lectures are amazing! I've been self-studying (won't be in college until fall) and your lectures are truly inspiring. Lately I've gotten where I want to actually *see* the physics I'm learning about, and not just all the equations (although I do love the math behind it) and your lectures satisfy that need perfectly! I plan on pursuing a doctorate in physics (even though it's way down the road), and I hope I can become even half as good as you in inspiring students!

The last part was mesmerising Professor! Thank you so much for your lectures :)

Cloud chambers are so fascinating, as well as the explanations given by the genius Dr Lewin!

This is not a lecture Its a Masterpiece , sir it your best lecture ive seen thank you from the bottom of my heart

I started craving for the lectures, ever since I got started... I can't help sneaking though a couple of those even during office hours... :)

I wish I could have live lectures from you. You are my inspiration sir after listening to your lectures I decided to study physics. I have no words to say about your lectures. Your lectures are gift from God. Respect from Pakistan.

My teacher always marvels at my knowledge in the topics I wish I found this earlier Thank you and love from Nigeria

This lecture really hit some emotional heartstrings for physics inside of me. I really appreciate this.

Wooow sir! This is literally the best physics video I have ever seen and this increased my respect to the beauty of physics 💙💚💜.. Thanks a lot sir.. Wishing you good health

Watching this because my physics lectures are online and they are boring without experiments. I love that you do them in every single lectures. Thanks, Professor!

i get confidence for exams after watching your lectures...thank u very much!!

Cyclotron at 20:50 (for my reference)

thank you very much sir , I found physics little difficult but when I come to your lectures it became very easy for me . really sir you are the best physics teacher who clears the concepts so clearly & nicely, thank you very very much . sir you are an amazing personality. hats off to you

This helped me a real lot sir this course makes me potential that i can crack my neet exam luv from TAMILNADU💜 INDIA

Sir your lectures are extremely incredible and it make me to learn physics more deeply

Your explanation is outstanding... Thanks to you and edupoint !!!!!!

I wish i had a physics professor like him in my school 😪

I am a jee aspirant and your lectures really make it easy for me to understand the concepts Thank you sir.

can’t believe this was filmed in 2002, this is a timeless piece of art.

The "Flashforward" was amazing. Thanks for that! It gives Physics a sense of exploration and discovery, quite an awesome feeling.

Thank you so much for helping me understand. Nice to know there are still some good teachers

Dear Professor, Ever since I started watching your lectures I have developed the habit of looking through equations. It has created a tremendous development in the way I think and teach physics. I request you to make dedicated lectures in theory of relativity. Love from Chennai( India)

I live in India I am 17 years old studying in 12th standard it helped me a lot to prepare me for my board exams thanks after my school I definitely be going to be an engineer and I hope soon I will come to USA as they teachers like him to teach us.

loved it..such a great mix of qualitative and quantitative physics..

That's really a new world to naive ones like me. These lectures of Prof. Lewin from 2002 are still magnificent in 2024.❤

Thank you sir. it is really enjoyable. here I can study and at the same time can verify experimentally , again thank you very much sir for your contribution for students and physics.

Really appreciated lectures by you sir 😄 You really made me to love 😍😍 with PHYSICS. Im from INDIA,i too have shared your lectures to my couple of friends. My love 😍 to you and your physics from INDIA.

Hello sir 🙂 I'm from India 🇮🇳😀 TodayI studied it in my physics book 📖🙃🙂and curiosity brought me here..!!!! Love from deep of my heart ❤and from India

Like love and respect from India professor. From my opinion you deserve NOBEL PRIZE.

For the love of physics💕 Absolutely excellent lecture that cleared all my doubts... Loads of 💕 from India...

Hello sir I am from India , after watching this lecture and many more i have really now started looking beyond equation ..really love the way you teach physics ...!!!

Sir, You are just too amazing You made physics more adorable than it was before for me . You are such an inspiration to the youths .lots of love to you sir ..god bless you ♥️

By your lecture I can understand nature now more easily sir ur lectures help me alot in my journey to understand this nature 🙏🙏🙏

Wow! Thank you so much, a very amazing and informative lecture! I enjoyed peeking into the new world sir 🙏💖

This is from 2002 ? I cant belive it still gold💜

It's always interesting to compare the predictions made in the past with the actual progression of events.

thank you profesor for this wonderful lecture !

Beautiful with practicality I your explanation makes my mind think beyond the boundaries 🎉 thank you so much for this wonderful lecture sir🙏 love from Tibet

Sir big fan of you.Thank you sir for this lecture. Love from India.

33.02 can't miss. Its old news now. But for him to add that is truly a gold of a gesture

I finally understand your dotted line secret

I would like to thanks for your incredible work for entire world!

All i can say for prof. Walter lewin is thank u sir. Everytime when i used to get bored in my classroom i always miss some lectures but i didnt have any tension because i have Prof Lewin with me. Thank u sir.

This is beautiful. I studied philosophy at UCLA and now almost 10 years later I’m learning physics. This lecture series is perfect because you throughly explain the theory and almost more importantly make it real with demonstrations. It’s kind of sad that with all this knowledge (free MIT lectures) general knowledge seems to be regressing into a world of conspiracy theories and nonsense. I do think the traditional lecture format, as powerful as it is, will soon be replaced by other forms of teaching like the channel Physics by Eugene... anyway, for now a proper lecture series hits the spot for me :)

Ur lectures are best on RU-vid love from India

That time traveling scene was so cool!!!

I really wish I could meet you. You are amazing sir! ☺️❤️

This lecture was great, thank you. And I always love cloud chamber demonstrations! [golf clap]

As a highschool student, i only needed the part with the cyclotron. But still, it was very helpful

I will be happy if you come and teach physics in our school in India Because your videos motivating me to learn Physics -Student of Walter Lewin sir from India🇮🇳

The final Demonstration is mind blowing. We were looking at actual radiation. Real particles. My mind is blown.

Nice professor...love from India 🇮🇳 👌 👍

Regarding the cyclotron, I'm confused about how the protons can enter and exit the dees, seeing as they are made of metal conductors. How do protons enter and exit a solid?

This lecture was in the same year I was born. Crazy

Very Productive and Interesting lectures,These were very helpful to me.

Another amazing lecture! I always learn something new!

Nice lecture sir ,love 💕 from India🇳🇪

Sir why do charge particles experience force at all from magnetic field.Is it a fundamental property of magnetic field?😁😁😁too fundamental question but plzzzz ans

Thank you so much Sir. I understood the concept much better here.

has he ever covered thermodynamics in his lectures ?

I love your all lectures sir. I learn a lot from you.

"Let's Go back to 2002" - watching it in 2024. Prof Lewin should give us an update on the latest development of physics on youtube

certainly the best person on physics explanation is you. I tried for mit to explore the world range of physics but the present US policy for forgein student really doesn't seems to be inviting us. so, with all due respects i would like to ask for the links to connect all lectures given by you. sir, without a doubt.

Love from INDIA sir....

1:30 lecture starts❤

best lecture,i have ever seen

sir, I found it why you put different badges on the right of your shirt : to assure more concentration on your interesting lectures than on those badges

In which lecture is it that you distorted a tv image?

Very intuitive lecture

Sir ,why isnt the proton moving in a loop when they are outside the dees.please tell

Why my answer is not matching with you.. I'm getting a very small radius which is not 15 cm.

Professor Lewin ; an offbeat question.. what's written on your badge ? also ive noticed that in every lecture you wear a unique badge , why do you wear them ? I like your style :D

Dear Professor, What is the trajectory of a proton moving across the B field with an increasing velocity v=vo+at?

Sir! Please provide a link to download physics notes.

haha was great to see an edit for LHC. great lecture as usual.

Love from India......

thank you so much sir, for this lectures specially the cyclotron part was quiet interesting.....

Thank you for your lecture sir. Great. Can you list out few of your favourite physics books?

Dear Prof. Walter Lewin, Where can I find videos on rest of the topics, not covered in 8.01 and 8.02 video lectures , I am appearing in GRE physics after two months. It would be very helpful, if I find it as videos lectures.

Thanku❤️

Sir would you please prefer a good physics book.

Just curious, are the breaks in the file due to the radioactivity?

Love from india sir♥

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)

Great lecture as always.

Sir and for changing the frequency of the cylclotron twice each, do we do it manually or is there any other mechanism?

Why did you say "Wow" at 44:06, what was there?

My favourit lecture .

Dear Mr Lewin if the proton is in a Electric field it is accelerated , so why the speed is constant ?

Isn't Lorentz force the sum of the electric force and magnetic force