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.
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.
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 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.
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.
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!
@@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
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.
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)
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.
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.
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 🙏
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
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 RU-vid, you truly are the best!
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.
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.❤
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.
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.
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'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!
“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.
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!
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!
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 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 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
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
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..
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.
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.
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.
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 🙂🙂🙂
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!
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.
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!
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
It was the first time i am enjoying physics and not learning it. The lectures was far better my teacher it was really awesome to experience your teaching.hats off....
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.
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.
Sir I am now in my class 11th From India ..I was watching your lecture from since class 8th now i am able to see Physics everywhere because of you.. ....But sir I wanted to call you before you will leave this world If it can possible...... Walter Lewin Will be unforgettable name in the History of physicist ❤❤❤❤❤
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
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!
It is just amazing to have such a professor with so much passion and a brilliant way of explaining methods. Maybe I am old for this. I wish I had this lecture back then in my school time.But still I have learned a lot. thanks a million.
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.
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.
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)
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...!!!
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 ❤
Hi Professor, I had a recommendation... The problem is, your lectures aren't particularly easy to find through google as the titles don't have the keywords that would usually be used for searching for these lectures like "Lectures on Physics by Walter Lewin High Quality" or something equivalent... Your current naming convention of course is very nice and well-structured and hence shouldn't be disturbed, but I would recommend adding just one video with the title including the commonly used search phrases... Something like "Lectures on Physics Uploaded by Prof Walter Lewin in High Quality" perhaps... I'm sure it will increase viewership and access even further... Thanks for your time Professor... Have a nice day... :)
+Lectures by Walter Lewin. They will make you ♥ Physics. Hi Professor, My suggestion is as follows: 1. Make a short introduction type video in which you give an overview of this youtube channel that you have which essentially gives a brief summary of the content, like Physics Courses 8.01, 8.02 and 8.03, some seminar type videos for science popularisation etc 2. When you upload this video, you should give this video a name that would be probably for a google search query like "Walter Lewin - Physics Lectures - HQ - Fall in love with Physics" 3. You could also perhaps some more information in the introductory video, like your recommendations regarding books (Ohanian, Giancoli and any other), the availability of assignment files and solutions in the description of each lecture file and any other info that you think might be relevant and not particularly obvious How will this help? Essentially, your lectures turn up a little low on google searches... I found them through Quora where a person responded to a query that your lectures were available here maintained by you personally... When a person makes a google search for Walter Lewin lectures, he gets directed to the channel "For the Allure of Physics" which has mostly the same lectures but they aren't high quality, they're missing some things and they don't have the assignments... As a comparison, your self-contained talk on May 16, 2011 has about 57 k views on your channel as opposed to about 2 million on his despite having been uploaded within 3 months of one another... :)
+Adil Ahsan I do not understand the difference between 2. When you upload this video, you should give this video a name that would be probably for a google search query like "Walter Lewin - Physics Lectures - HQ - Fall in love with Physics" What is the difference between "Walter Lewin - Physics Lectures - HQ - Fall in love with Physics" and "Lectures by Walter Lewin - They will make you love Physics". That's the name of the channel now.
+Adil Ahsan My channel has now 7000 viewers daily, Allure 10,000. Allure has remained constant for that last year, my channel keep going up every month and will pass Allure by the summer The reason why my talk "For the Love of Physics" is 20 times more popular on Allure than on my channel is NOT because Allure has more viewers. There must be another reason, which has to do with "google searches".
Hi Professor, How did you find or choose error for a measurement? Please teach me the trick. Your lectures are very much helpful for my jee. You Become my Inspiration ♡. Is there any way to interact with you? through like zoom, Google Meeting.. Love from Tamilnadu, India.❤
To determine the uncertainty, you look at the smallest possible difference between measurements that your measurement method could have. Then you practice measuring quantities of a known value. Measure a 3 ft [91.44 cm] piece of material with a factory length on your tape measure in cm/mm, and see how close you can get your values to each other. Measure an object on a scale and see how the last digit may vary between trials. Your uncertainty has to at least be as large as half the last increment between readouts, because that's the limitations of the device. You might also have an uncertainty that is governed by your specific experiment. For instance, the giant pendulum in Professor Lewin's lectures has an uncertainty beyond the uncertainty of a tape measure, because the cable length stretches with the tension, and the tension varies with the speed and position. The undertainty in the cable length would need to account for its range of lengths over the course of the experiment. Time can be done by testing your reaction time. There are websites that set their background to change at a certain timestamp, and you are supposed to click or press a key when you see it change. It will then tell you how many milliseconds it took for you to react to the color change. You can also measure reaction time, by having a partner drop a ruler and you catching it once you se it fall. Using d=1/2*g*t^2 solved for t, you can measure your reaction time.
Professor Lewin is one of THE BEST physics Lecturer . I love you so much ❤ I dont STUDY physics through your lecture ...I FEEL it. It never feels boring when you teach it. I wish I was there face to face with you at MIT...
The funny professor who gives his lectures with such an enthusiasm, love his dutch accent and his great way of presenting the physics of our world and beyond. I like to call him the dutch Einstein.
