How about when the two charges are equal but one is positive and one is negative? If you are very far away from the two? In which direction the e field would go? mentioned this around 14:15
i just wanna know about the grass seed electric field lines.. what is the shade in the middle of the field that dissappears when you connect the electrodes on wimshurst generator??
@Omatunto It is my opinion that the students who attend these universities are far from an ideal intellectual youth and are likely either very hard-working, educated very well as well as very smart, and in far fewer cases amazingly brilliant or genius. The ones who are zealous students often suffer in ways that people in less demanding programs do not experience, and are perhaps better off for that. More often than not, it is quite likely that each student in this class is, in fact, human.
at such universities like MIT only geniuses are allowed to study. these kids sitting there look too human-like, just like me or my friends. just my opinion though, no offense
is it a "real" lecture at MIT? i mean, maybe it's just some extension courses for dummies or for those studying humanities...
i'm asking this because i am very poor at math and physics, but when i watch these lectures for extended periods of time i begin to think that i almost understand that stuff about electromagnetism. and if i just study even more harder then i would become kinda specialist in this.. this is baffles me, i think true lectures at MIT are much more harder, this is just a joke
@Omatunto right, if you're poor at math and physics and you could understand this very clearly then Walter succeed at teaching, good education ≠ hard lecture
@Omatunto The homework and assigned reading is probably quite hard; I've looked at a handful of courses from MIT OCW and thought the same thing... "Hey, this is easy!" Then you look at the assigned work (where available) and it's insanely difficult. These lectures are just to supplement the other hard/boring stuff.
I'm just wondering, who is the person that types all of "MIT" 's comments and represents the Institution on Youtube? I would guess that it would be an admissions official? MIT, can you enlighten me on this??
I owe you Mr. Walter Lewin. I wish i could sit in your class. thanks to the technology. I clapped for your in my home when you can't see me. I have so much respect for you. I am so much far away from you and i must say you are the true definition of the teacher. Thumbs up guys so that Mr. Walter can see this.
Im from Mexico, physics engineering student from the Metropolitan Autonomous University. I have to say thanks to everyone involved in this project of sharing your lectures with the world, and very special thanks to Professor Lewin for such a wonderful way of sharing knowledge i would give a kidney to meet him. :D
Prove to me blood pumps through the Capillaries. Are you telling me electricity is the pressure? What is electric potential? What solution are you talking about?
@tnguyen318 hearts beats because of electricity e.g. suppose u r going 2 meet an accident(i pray u dont) if ur hert stops beating they will give u shocks........................
"Today, a young man on acid realized that all matter is merely energy condensed to a slow vibration — that we are all one consciousness experiencing itself subjectively." ... "Here's Tom with the weather"
The 'View the complete course' link is misleading to another course (8.03 Physics III: Vibrations and Waves from 2003) this course's homepage ( aka 'the right url') is ocw.mit.edu/courses/physics/8-02-electricity-and-magnetism-spring-2002/
@94XJ in stead of pull the chalk, you should push it, under a certain angle, then push uit, it will bump over the chalkboard, at least i think thats how he might be doin it
I dont mean to ruin the professionalism of the tone of our commentaries, but . . . has anyone else noticed that his rod and sphere drawings at 28:28 look like a dick and balls?
I think the subtitles are meant for deaf students. Thats why it comes up so early. Its so that they can see and read what he is about to point out on the board or experiment. Makes sense to me.
After this lecture electron hit the bar... the barman,proton served sme drinks to electron, a double berry, 2 sex on the beach and 6 touch down... Electron: "The bill please" Barman Proton: "free of charge"
@captkirkconnell I GO TO A COMMUNITY COLLEGE and LEARNED 3 semesters of CALCULUS BASED PHYSICS. American education is worth the money no matter it is at State University of New York, Rice University of Houston Community College.
Former Scientology staffers, including Jeff Hawkins and Stacy Young have alleged that Miscavige physically and emotionally abuses his subordinates, including high-ranking executives. Church representatives have consistently denied such accusations. Hawkins, a senior marketing executive in the Church, claimed that Miscavige had physically assaulted him at an executive meeting in 2002, and, on other occasions, had punched him in his stomach and hit him on the head.
@OpenComments@OpenComments i got 23 comments from you in 10 minutes time. The english and punctuation is all good . Thats immpossible fpor a human to do. All your comments are long windied and distinct. All on the same subject which is a covert PR attack on my religion which is not even a part of my orginal comments or the substance of the video I was watching-- You are a Software program designed by someone who gets paid- I take it as a validation that i am a target.
They do a lot of “on-ness” – stuck on things, as different from in things. They went on and couldn't get off.
The NED time track (i.e. time track of Dianetic auditing on a Clear or above) is com-posed of BTs parked on the time track – not in PT – you look down the time track and wake them up. They are stuck on the track and they also have pictures of themselves stuck on the track.
You can get partial blows where the BT or cluster comes off the Pre-OT's body but stays in the room, plastered on a wall or outside the room. These can push TA up until blown fully. When they hang up it is because they still have a connecting string to the body or because they conceive some barrier they have hit is impenetrable. The handling is to cut the beam or push them through the barrier or simply repeat the process.
What's a good way to draw or render field lines? Don't just say they're imaginary, I know that. If you make a field line exiting each source in 15 degree increments, can you predict where they'll point?
M.I.T shows real commitment to learning and education, allowing such good lecturers to be shown to the common person, giving people the thirst for knowledge.... thankyou mit :-)
Eimstein is the most famous fraudulent scientist in the history of science. Relativity theory is completely false. But it defends the law of energy conservation against the truth, so the fuel/energy complex promoted relativity theory to the rank of the most famous physical theory. (They are afraid of the perpetual motion machine of the first kind - properly so, it is possible). If you want to see a proof that relativity theory is false, send me an e-mail - my e-mail address is in my contact box.
WOW... Many thanks to MIT and prof Lewin for making these videos available for free. You have no idea how helpful they are. BTW, what the hell are the 'visitors' doing ( at about 27:30)
@koviack You can do that too: Put the chalk perpendicular to the board and press softly, than quickly pull it in any direction and the chalk will bounce by itself.
@mohab1989 Nope. There is no chalk holder. Just chalk. And he doesn't do it by super-fast dotting the line either. He holds the chalk almost perpendicular to the board, but ever slightly away from the direction of motion (maybe about two degrees). Then, due to the high pressure, by moving the chalk he causes a skip-dragging effect where the chalk skips, lands and drags on the board very briefly, skips again, and so forth. Same principle as wet finger moving on wine glass rim = high freq. sound.
@WeShallBurnInHeck You must be the type that prefers magic over rational and demonstrable explanations. Oh, and by the way, Ive got the same "mad skills".
I hope i made sense about the whole trajectory of the charge thing that I asked about...Please let me kno, if any of you can explain this....Thanks!!
PS:Thank you MIT for such BRILLIANT material..
And THANK YOU Prof.Walter Lewin for making these things sooo interesting and simplified:)!!!You are THE best Physics Prof. EVER!!!I wish i could some day sit IN ur class for real...Be a part of it rather than virtually watch genius in action:)
I thot field lines were our perception of a file...If thats the case then how do we classify them as "curved" or "straight"?I mean if the field lines are an indication of the direction of the field,as we see it...then dont we also decide how the field lines should look?Also y is it so hard to find out the trajectory of the charged particle...Wouldnt its locus be the same as the family of curves of the field lines?Unless of course the field lines are are not "symmetric" or "concentric".Pls help.
I'm not affiliated with MIT at all, but if you feel like you've benefited from this free MIT video, you can donate $ to MIT opencourseware. Donate as much as you appreciate and value these kinds of free educational courses which i personally love too...I'm just busting all of your balls :) do whatever you want
Ok I have a question. After watching the +3 and -1 charges, +3 is the hair dryer and -1 is vacuum cleaner. And so +3 blows out and -1 sucks in but the effect is not as much as of +3.
What if both are +3 and -3? I mean if a charge is places far away, what will happen to it?
What he means is when it is far away, the two charges can be considered one charge, and together become a +2. Or can be assumed to be so. But only far away. He had implied his earlier example was not that great since it was not far enough. It's like a helium atom missing an electron. It will have the affect of a positive ion.
@sonutulsiani nothing because the electric force of both charges will just cancel out.... also if the distance between them is so far it could be insignificant because the radius is inversely proportional to the electric force.
When he does the electroscope experiment with the POSITIVELY charged ball; shouldn't the reading become smaller, because the electrons stream down? After he creates the dipole, he takes the POSITIVE ball, not the NEGATIVE. Because he takes the POSITIVE ball, all the electrons in the electroscope should attract, stream down, and therefore the aluminum foil(?) should come closer, not separate even more, No?
When he uses the positive ball, the electrons stream down (those are the free moving electrons), but the positive ions stay there on the aluminum foils, therefore repelling each other.
Thats what I thought but thanks for pointing it out.Walter Lewin is definitely an inspiring person,I think his lectures are great...Im in my third year of electrical engineering and his lectures have really helped me with some confusing concepts.check out the madras polytechnical institute on youtube.punch in for example " lecture 4 Some useful laws in basic electronics " and have a look around, Ive found some good lectures there..Its a bit challenging to understand the indian english though!
at min. 33 when he demonstrates the dipole...he charges the electroscope with 1 sphere and then grabs the conductive mast of the other ball with his bare hands in order to bring it closer to the already charged electroscope ..surely the charge of the sphere would drain through his body to earth , no? maybe the mast is made of plastic or maybe I roll-up too much...
I really think MIT should be Applauded for allowing this very high level of education to be released on youtube....and on top of that FREE of charge. Im not a physics student.....but i always tell people i am attending the University of YouTube ;) lol....a Huge thanks goes out to you from alot of us MIT & Dr. Lewin of course :)
Hey, that works also...you dont exactly have to be "schooled" to be educated thanks to Youtube and University like MIT lol...good luck with your research.
@scottbpt i totally agree, when I was taking E and M and Physics II I would watch MIT videos after my professor forgot to teach us certain subjects... this stuff helps so much
@scottbpt I think it is awesome. It is possible for the whole world to get education for free. This is the best possible way to use the Internet. I learned a lot by watching these lectures, and I am very glad that MIT is sharing these lectures.
Right here but most people dont' understand this stuff...lol....but it the ones who want to learn have a computer and internet and a place to look at it have looked at it.
what the hell @28:05? o.O?
Ghaiyst 4 days ago
why did those visitors drop by?
kingGgame 1 week ago
How about when the two charges are equal but one is positive and one is negative? If you are very far away from the two? In which direction the e field would go? mentioned this around 14:15
4thKyuubi 2 weeks ago
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I am very happy to see the vidoe Electric Field Field Lines Superposition Inductive Charging Dipoles Induced Dipoles after you give this
Kricardose 2 weeks ago
I Love The Video Electric Field | Field Lines | Superposition | Inductive Charging | Dipoles | Induced Dipoles It Can Increase My Knowledge
bebeheuy 2 weeks ago
Steady I Really Like This Video Electric Field Field Lines Superposition Inductive Charging Dipoles Induced Dipoles
Mjhond 2 weeks ago
i just wanna know about the grass seed electric field lines.. what is the shade in the middle of the field that dissappears when you connect the electrodes on wimshurst generator??
can i get an explanation
xXEdoBombaXx 2 weeks ago
@Omatunto It is my opinion that the students who attend these universities are far from an ideal intellectual youth and are likely either very hard-working, educated very well as well as very smart, and in far fewer cases amazingly brilliant or genius. The ones who are zealous students often suffer in ways that people in less demanding programs do not experience, and are perhaps better off for that. More often than not, it is quite likely that each student in this class is, in fact, human.
theskyisbigandwide 1 month ago
mmh wie geil hab 3 brüste
OnitaAleidatw503 1 month ago
at such universities like MIT only geniuses are allowed to study. these kids sitting there look too human-like, just like me or my friends. just my opinion though, no offense
Omatunto 2 months ago
is it a "real" lecture at MIT? i mean, maybe it's just some extension courses for dummies or for those studying humanities...
i'm asking this because i am very poor at math and physics, but when i watch these lectures for extended periods of time i begin to think that i almost understand that stuff about electromagnetism. and if i just study even more harder then i would become kinda specialist in this.. this is baffles me, i think true lectures at MIT are much more harder, this is just a joke
Omatunto 2 months ago
@Omatunto right, if you're poor at math and physics and you could understand this very clearly then Walter succeed at teaching, good education ≠ hard lecture
AugustinusSextus 1 month ago in playlist MIT 8.02 Electricity and Magnetism, Spring 2002
@Omatunto The homework and assigned reading is probably quite hard; I've looked at a handful of courses from MIT OCW and thought the same thing... "Hey, this is easy!" Then you look at the assigned work (where available) and it's insanely difficult. These lectures are just to supplement the other hard/boring stuff.
kevineugenius 2 weeks ago
I'm just wondering, who is the person that types all of "MIT" 's comments and represents the Institution on Youtube? I would guess that it would be an admissions official? MIT, can you enlighten me on this??
EgoSumIndigentia 2 months ago
cool.never thought physics could be fun.
violetmoonster 2 months ago
@ 28:02 THE VISITORS ARE HILARIOUS!!!!!!!
shefikb 2 months ago 2
Excellent! The last experiment was really cool.
AnuarPhysics 3 months ago
Forget about being a teacher, this man is god himself.
hduoawbdo221 3 months ago
I owe you Mr. Walter Lewin. I wish i could sit in your class. thanks to the technology. I clapped for your in my home when you can't see me. I have so much respect for you. I am so much far away from you and i must say you are the true definition of the teacher. Thumbs up guys so that Mr. Walter can see this.
hello12913 3 months ago 7
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I don't understand how electrical dipoles 'fall off' at a rate of 1/r^3......
ghettojut 3 months ago
Comment removed
ghettojut 3 months ago
Thumbs up for Prof. Lewin TV show (PBS, HBO or AMC produced) teaching science to the masses.
Brendude 4 months ago
how the hell does he do dotted lines like that ?? o_O
gridironkid56 4 months ago 3
@gridironkid56 Physics ;)
hmfmi 4 months ago
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THAT is how you end the class !! THAT !
saggoh 4 months ago
wtf happened @28.07? lool
harsha205 4 months ago 7
@harsha205 georgia tech lecture crasher posers...
ph7ryan 3 months ago
the force is strong with Prof. Lewin.
MrLaughEveryday 5 months ago 4
Im from Mexico, physics engineering student from the Metropolitan Autonomous University. I have to say thanks to everyone involved in this project of sharing your lectures with the world, and very special thanks to Professor Lewin for such a wonderful way of sharing knowledge i would give a kidney to meet him. :D
gabinobarreda 5 months ago 4
HOLA
happytryfriend 6 months ago
Prove to me blood pumps through the Capillaries. Are you telling me electricity is the pressure? What is electric potential? What solution are you talking about?
tnguyen318 7 months ago
@tnguyen318 hearts beats because of electricity e.g. suppose u r going 2 meet an accident(i pray u dont) if ur hert stops beating they will give u shocks........................
abhishek0raut 6 months ago
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"Today, a young man on acid realized that all matter is merely energy condensed to a slow vibration — that we are all one consciousness experiencing itself subjectively." ... "Here's Tom with the weather"
sn1pe352 7 months ago
The 'View the complete course' link is misleading to another course (8.03 Physics III: Vibrations and Waves from 2003) this course's homepage ( aka 'the right url') is ocw.mit.edu/courses/physics/8-02-electricity-and-magnetism-spring-2002/
consistent1 7 months ago 7
@consistent1 Fixed! Thanks for catching that.
MIT 7 months ago
A lecture on his dotted line technique would helpful.
94XJ 7 months ago 52
@94XJ in stead of pull the chalk, you should push it, under a certain angle, then push uit, it will bump over the chalkboard, at least i think thats how he might be doin it
hell043 1 week ago
You guys noticed the egg on the shirt?
djpremier333 7 months ago 8
I dont mean to ruin the professionalism of the tone of our commentaries, but . . . has anyone else noticed that his rod and sphere drawings at 28:28 look like a dick and balls?
melvyndrag 7 months ago
Is it me, or did he draw that dotted line insanely fast
PwnforceFrank 7 months ago 7
Fucking magnets, how do they work?
Paumonsu 7 months ago
Seriously,they guy always has something on his shirt!
What's up with that?
Why do all good teacher haveto be kind of crazy?
HeartYukitty 8 months ago
28:00 ???
sghfqwe 8 months ago
omg any professor with hair like that has to be good!!
physicsisssfun 8 months ago
FFF love this guy. If my professor did as many demos I would never skip xD
ImmortalRei95 8 months ago
"left" hahaha
Youdianwuyua 8 months ago
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MIT Huge thanks for your Open Courses !!!
yuraaa1990 8 months ago
Comment removed
yuraaa1990 8 months ago
I think the subtitles are meant for deaf students. Thats why it comes up so early. Its so that they can see and read what he is about to point out on the board or experiment. Makes sense to me.
noobmaster31 8 months ago
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..SITE'.,HAS,:FREE:,IPAD'::2'OFFERS,:
ＷＷＷ.ＩＰＡＤ２ＸＣＯＭＰＬＥＴＥＬＹＦＲＥＥ．ＴＫ
COPY SITE & PASTE
disagreeablegimNa 9 months ago
wtf is at 28:00
nutCaseBUTTERFLY 9 months ago
@nutCaseBUTTERFLY
Student activities, I suppose. Not even MIT is spared from this it seems. Quite rude, at least at my university they do it during the breaks.
Nizleib 9 months ago
@nutCaseBUTTERFLY amazing call
8enjamin1 8 months ago
What is going on with this so calld visitors??
colayna25 9 months ago
I really enjoyed this. Great teaching style. Thanks to Walter Lewin and to MIT for sharing this free of charge. No pun intended.
seudonak 9 months ago
please subtitles in Spanish
1jobato 9 months ago
@koviack omg rofl that is hilarious!!!
TheCyberxshot 10 months ago
oh man, thank god i took concentration 8.02 first
LethalHobo 11 months ago
baguette & two lollipops in 27:33 :P
TheNameIsDan 11 months ago 4
"Don't be late"
yrsnkd 1 year ago
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that fried egg is so cute !!!
S10000500001 1 year ago
slip of the pen :) the 1st link in the description links to the wrong lecture i.e.
8.03 Physics III: Vibrations and Waves
mdinka 1 year ago
After this lecture electron hit the bar... the barman,proton served sme drinks to electron, a double berry, 2 sex on the beach and 6 touch down... Electron: "The bill please" Barman Proton: "free of charge"
umeirdestination 1 year ago
never seen people clap after a college course, wow hes a great teacher lol
fyio123456789 1 year ago
Sounds like someone got their ass beat after this lecture by the sound of 28:03
DarkArchon212 1 year ago 2
Is it just me or the subtitles are screwed up?
rinwhr 1 year ago 5
@rinwhr They definitely were. Thanks for catching this, and let me know if you find any other problems.
—MIT OpenCourseWare
MIT 1 year ago 19
@MIT Thank you for reading the comments and reacting to them.
At first i thought you guys just uploaded this lecture and forgot about it, but you proved me wrong :)
Keep it up.
mursie100 11 months ago 2
@rinwhr just you
Youdianwuyua 8 months ago
Walter Lewin is my father, I see he has many fans...
junior1984able 1 year ago
Paul Hewitt is better with chalk, however, this professor is far smarter than Paul Hewitt.
victorofsystem 1 year ago
Doc is talking about plus and minus polarities but in essence there only electrons(minus charges) and lacks of them (simulating plus charges).
So the duality (+/-) is simply simulated by one medium (electrons) from beginning.
There is no pluses repelling. It's just sharing deficit of electrons. And so on..
Equally charged repel. Differently charged gather. The same as in Rychnowski planetary model. (BTW the man condensed electrons).
digicho 1 year ago
this is 10000x better than my university.
blazinhomo 1 year ago 3
american EDUCATION SUCKS BUT MIT is ok in a different reality- they must of trown out the shrinks or ignor the depart ment of educTIOn
I respect MIT and like this particualr Professor - still some education happening in USA down at MIT
captkirkconnell 1 year ago
@captkirkconnell I GO TO A COMMUNITY COLLEGE and LEARNED 3 semesters of CALCULUS BASED PHYSICS. American education is worth the money no matter it is at State University of New York, Rice University of Houston Community College.
ENLIGHTEN URSELF!!
gulloogtg 1 year ago
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@captkirkconnell
Former Scientology staffers, including Jeff Hawkins and Stacy Young have alleged that Miscavige physically and emotionally abuses his subordinates, including high-ranking executives. Church representatives have consistently denied such accusations. Hawkins, a senior marketing executive in the Church, claimed that Miscavige had physically assaulted him at an executive meeting in 2002, and, on other occasions, had punched him in his stomach and hit him on the head.
OpenComments 1 year ago
@OpenComments @OpenComments i got 23 comments from you in 10 minutes time. The english and punctuation is all good . Thats immpossible fpor a human to do. All your comments are long windied and distinct. All on the same subject which is a covert PR attack on my religion which is not even a part of my orginal comments or the substance of the video I was watching-- You are a Software program designed by someone who gets paid- I take it as a validation that i am a target.
captkirkconnell 1 year ago
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@captkirkconnell
They do a lot of “on-ness” – stuck on things, as different from in things. They went on and couldn't get off.
The NED time track (i.e. time track of Dianetic auditing on a Clear or above) is com-posed of BTs parked on the time track – not in PT – you look down the time track and wake them up. They are stuck on the track and they also have pictures of themselves stuck on the track.
OpenComments 1 year ago
@OpenComments ..
captkirkconnell 1 year ago
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@captkirkconnell
You can get partial blows where the BT or cluster comes off the Pre-OT's body but stays in the room, plastered on a wall or outside the room. These can push TA up until blown fully. When they hang up it is because they still have a connecting string to the body or because they conceive some barrier they have hit is impenetrable. The handling is to cut the beam or push them through the barrier or simply repeat the process.
OpenComments 1 year ago
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@OpenComments
PLEASE watch my video on the Electrinium battery.
electricitymagnetism 11 months ago
What's a good way to draw or render field lines? Don't just say they're imaginary, I know that. If you make a field line exiting each source in 15 degree increments, can you predict where they'll point?
sobeita 1 year ago
M.I.T shows real commitment to learning and education, allowing such good lecturers to be shown to the common person, giving people the thirst for knowledge.... thankyou mit :-)
freemind4ever 1 year ago 3
Don't be late! That means you, pretty boy! lolololololololol
"I'm impressed" lol coming from a guy with an egg on his shirt....
ha, mit is a freaking zoo.
i would know.
i went there :P
EgoSumIndigentia 1 year ago
thank you
metalscale 1 year ago
great teacher man, he is so good, I have physics test soon and this lecture helped me understand this a lot.
Now I see why MIT is top notch engineering school.
Spdowind 1 year ago
Google has done a great job for science and education. Youtube is now a great source for such information
usman710 1 year ago
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Free Energy is real and its here! The Oil companies are doing everything they can to stop these
information. If you want a Free energy machine do a search in youtube for the LT MAGNET MOTOR , Join the
revolution!
buchananfibbing 1 year ago
how to get in MIT!! free pleese! tel me
loxy777 1 year ago
Does he have a fried egg on his shirt?
aquaknot 1 year ago
That thing is probably some kind of raw sewage container... go ahead and rub your face all over it! --GLaDOS
WL, you made my Friday.
dropdeadsed 1 year ago
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Eimstein is the most famous fraudulent scientist in the history of science. Relativity theory is completely false. But it defends the law of energy conservation against the truth, so the fuel/energy complex promoted relativity theory to the rank of the most famous physical theory. (They are afraid of the perpetual motion machine of the first kind - properly so, it is possible). If you want to see a proof that relativity theory is false, send me an e-mail - my e-mail address is in my contact box.
henrykay01 1 year ago
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@henrykay01 oh! then please, stop wasting your time on youtube and go make your PP!
vanHillQ 1 year ago
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@henrykay01 Lol @ u.
JmSantos78 1 year ago
one of the greatest classes I´ve ever seen online! Professors should be taking notes too. Thank you for making them available for everyone Dr. Lewin
motemota 1 year ago
Why does he keep saying superposition is not obvious? Seems kind of obvious to me.
riorio23 1 year ago
@riorio23 it might make sense once you know it works, but it is not necessarily obvious based on pure logical thinking.
vanHillQ 1 year ago
@riorio23
Because what seems intuitively obvious to us might not be the way nature really works.
Diemedes 1 year ago
Comment removed
4BrownBrotha 1 year ago
This is why i love internet...
KortusLombardie 1 year ago 3
WOW... Many thanks to MIT and prof Lewin for making these videos available for free. You have no idea how helpful they are. BTW, what the hell are the 'visitors' doing ( at about 27:30)
mahela1993 1 year ago
Totally writing a superposition simulator right now. It'll be awesome.
OniLink10 1 year ago
i was a b .tech ,i cannot understand about thesecharges even i heard no of times.but by watching these videos iam clear now. thanks to Dr.Lewin....)
nagakumar999 1 year ago
a lot of think i dont understand....why do we need the lines of electric field
otTbc123 1 year ago
how did 10.30 dude get into MIT?
gorgolyt 1 year ago
@gorgolyt Haha my thoughts exactly. Apparently common sense isn't a requirement...?
walterbrunswick 1 year ago
This level is good, but i learnt it in 10th grade in India and reviewed it in the 12th grade, and now MIT is teaching this, its king of nostalgic.
k666358 1 year ago
this is the same as what we study in 12th standard...amazing...i can just listen to these lectures for some help...
Sclub7is7 1 year ago
What's with the gangsters? Which Illuminati club boasts MIT as it's home?
bloomingdedalus 1 year ago
THIS PROPHESOR IS JUST GRATE ..IM LEARNING PHYSICS AT ISRAEL....
AND HE IS VERY HELPFULL...A VERY NICE BUGJET AND A VERY GOOD PROPHESOR
immortal6699 1 year ago
pretty cool
derpistolenstern90 1 year ago
I would have actually enjoyed physics had I had such a good lecturer.
neothemagical 1 year ago 3
I've got 4 exams coming up in a few weeks. 3 of them are directly related to videos on the MIT page, BOOKMARK!
blackbsd 1 year ago
umm you uhh spilled a little fried egg on your shirt
bigfhead 1 year ago
Damn he is awesome. I'm learning Business Administration and Economy but if he was my teacher I would change to Physics at once!
MarkovicDeluxe 1 year ago
is anyone else wondering why he's wearing an egg?
xKorax 1 year ago
@xKorax I think it's because that without the egg, electricity doesn't work
fredadisl 1 year ago
whats with 28:03? Some weird american thing?
Great lecturer
hai2410 1 year ago
What a lecture...
hifhif123 1 year ago
WTF 28:03 ??
blindseba 1 year ago
this guy is worth every penny of tuition money
dorood 1 year ago 7
damn did u see how fast he drew that dotted line out with chalk? fucker has some skills
koviack 1 year ago 114
actually the trick is: ressonance
he just has to hold firmly and put in an good angle.
i do it a lot for fun xD
iamdonalduck 1 year ago 3
@koviack His chalk holder has a side for this. If you watch, he flips it every time he does a dotted line.
SnoopJeDi 1 year ago
@koviack You can do that too: Put the chalk perpendicular to the board and press softly, than quickly pull it in any direction and the chalk will bounce by itself.
richardbekking 1 year ago
@richardbekking I gotta try that...
mahela1993 1 year ago
@koviack It's obvious he didn't do it manually... I mean, he probably has some special chalk holder.
mahela1993 1 year ago
@koviack he has special chalk-holder to do this
sikorro 1 year ago
@koviack Seriously, how does he do that?!
oib4696 1 year ago
@koviack Actually it's not hard to draw the dotted line. U just need to change the angle of the chalk to the board
Amirikus 1 year ago
@koviack i think there's a mechanism in the chalk holder hes carnying that does the dotted line .. its not a skill
mohab1989 1 year ago
@mohab1989 Nope. There is no chalk holder. Just chalk. And he doesn't do it by super-fast dotting the line either. He holds the chalk almost perpendicular to the board, but ever slightly away from the direction of motion (maybe about two degrees). Then, due to the high pressure, by moving the chalk he causes a skip-dragging effect where the chalk skips, lands and drags on the board very briefly, skips again, and so forth. Same principle as wet finger moving on wine glass rim = high freq. sound.
kossmikham 1 year ago
@kossmikham Either that... or... he's got mad skills
I vote for mad skills
WeShallBurnInHeck 1 year ago
@WeShallBurnInHeck You must be the type that prefers magic over rational and demonstrable explanations. Oh, and by the way, Ive got the same "mad skills".
kossmikham 1 year ago
@koviack One of the funniest comments I've seen in a long time...
huntmatuk 1 year ago
That was great!
JanColdwater 1 year ago 2
Oh I am glad that is not my assignment! LOL
JanColdwater 1 year ago
probably the most useless subtitles i've ever seen
ultmtsnwbrdr 1 year ago 11
I hope i made sense about the whole trajectory of the charge thing that I asked about...Please let me kno, if any of you can explain this....Thanks!!
PS:Thank you MIT for such BRILLIANT material..
And THANK YOU Prof.Walter Lewin for making these things sooo interesting and simplified:)!!!You are THE best Physics Prof. EVER!!!I wish i could some day sit IN ur class for real...Be a part of it rather than virtually watch genius in action:)
nit323 1 year ago
Correction from previous comment:Perception of a "field"...:)
nit323 1 year ago
I thot field lines were our perception of a file...If thats the case then how do we classify them as "curved" or "straight"?I mean if the field lines are an indication of the direction of the field,as we see it...then dont we also decide how the field lines should look?Also y is it so hard to find out the trajectory of the charged particle...Wouldnt its locus be the same as the family of curves of the field lines?Unless of course the field lines are are not "symmetric" or "concentric".Pls help.
nit323 1 year ago
man his writing is sooo sick!! man i have never seen anyone with such skills with a chalk.
lifematch 1 year ago 5
I'm not affiliated with MIT at all, but if you feel like you've benefited from this free MIT video, you can donate $ to MIT opencourseware. Donate as much as you appreciate and value these kinds of free educational courses which i personally love too...I'm just busting all of your balls :) do whatever you want
brianmenendez 1 year ago
Comment removed
857tre 1 year ago
i wonder what textbook they use...?
i use the Young and Freedman University Physics Volume 2 12th Edition
GREAT BOOK! better than my professor, surprisingly!
msTINTINjoy 1 year ago
God this makes me wish I could go back and become a full-time student again! In fact if I could go back and be 21 again that would be nice too.
md65000 2 years ago 2
Ok I have a question. After watching the +3 and -1 charges, +3 is the hair dryer and -1 is vacuum cleaner. And so +3 blows out and -1 sucks in but the effect is not as much as of +3.
What if both are +3 and -3? I mean if a charge is places far away, what will happen to it?
sonutulsiani 2 years ago
It will act like a bi-pool, which if you are far away, looks like it's 0 I guess.
Compact3 2 years ago
sonutulsiani:
He talks specifically about dipoles at about 23:00.
Scurmicurv 2 years ago
What he means is when it is far away, the two charges can be considered one charge, and together become a +2. Or can be assumed to be so. But only far away. He had implied his earlier example was not that great since it was not far enough. It's like a helium atom missing an electron. It will have the affect of a positive ion.
jstafuckinusername 1 year ago
@sonutulsiani nothing because the electric force of both charges will just cancel out.... also if the distance between them is so far it could be insignificant because the radius is inversely proportional to the electric force.
msTINTINjoy 1 year ago
28:10
Don't be late, that means you pretty boy!
I'm intrigued as to what this was meant for.
DarkTrunksGeorgeSim 2 years ago 3
43:00
KakHazhar 2 years ago
At 33 minutes.
When he does the electroscope experiment with the POSITIVELY charged ball; shouldn't the reading become smaller, because the electrons stream down? After he creates the dipole, he takes the POSITIVE ball, not the NEGATIVE. Because he takes the POSITIVE ball, all the electrons in the electroscope should attract, stream down, and therefore the aluminum foil(?) should come closer, not separate even more, No?
abillionhearts4U 2 years ago
@abillionhearts4U The reading becomes large because both parts are now positive and like charges repel.
luzzie9 2 years ago
@abillionhearts4U
When he uses the positive ball, the electrons stream down (those are the free moving electrons), but the positive ions stay there on the aluminum foils, therefore repelling each other.
LogicalFlawDetector 1 year ago
Thats what I thought but thanks for pointing it out.Walter Lewin is definitely an inspiring person,I think his lectures are great...Im in my third year of electrical engineering and his lectures have really helped me with some confusing concepts.check out the madras polytechnical institute on youtube.punch in for example " lecture 4 Some useful laws in basic electronics " and have a look around, Ive found some good lectures there..Its a bit challenging to understand the indian english though!
electrosquid1 2 years ago
this professor is so good!!
MikeHall683 2 years ago 2
at min. 33 when he demonstrates the dipole...he charges the electroscope with 1 sphere and then grabs the conductive mast of the other ball with his bare hands in order to bring it closer to the already charged electroscope ..surely the charge of the sphere would drain through his body to earth , no? maybe the mast is made of plastic or maybe I roll-up too much...
electrosquid1 2 years ago
@electrosquid1
First time, when he seperated the balls, he did that also with this bare hands. The rod for the balls are insulated, so the experiment was correct.
GroundwarZeroHour 2 years ago
Hmmmm...
desertdick 2 years ago
I really think MIT should be Applauded for allowing this very high level of education to be released on youtube....and on top of that FREE of charge. Im not a physics student.....but i always tell people i am attending the University of YouTube ;) lol....a Huge thanks goes out to you from alot of us MIT & Dr. Lewin of course :)
scottbpt 2 years ago 100
lawl, i usually say the university of wikipedia
lwanatt 2 years ago 2
Hey, that works also...you dont exactly have to be "schooled" to be educated thanks to Youtube and University like MIT lol...good luck with your research.
scottbpt 2 years ago
This is very cool, and I love the way he teaches!
Dr. Lewin, Thank You!
I remained highly interested throughout the entire video.
AzBirdDog 2 years ago 4
@scottbpt i totally agree, when I was taking E and M and Physics II I would watch MIT videos after my professor forgot to teach us certain subjects... this stuff helps so much
Dogslax3333 1 year ago
@scottbpt I think it is awesome. It is possible for the whole world to get education for free. This is the best possible way to use the Internet. I learned a lot by watching these lectures, and I am very glad that MIT is sharing these lectures.
insAneTunA 1 year ago
@scottbpt u can always send in a donation to mit even if its only $20 to show your appreciation
brianmenendez 1 year ago
@scottbpt free of CHARGE? i love your pun
pahkee 1 year ago
what book does he use for the course?
oliveiradavi 2 years ago
Great course Thanks MIT
johnq3000 2 years ago 4
Free College course, Thank you for posting
brianmenendez 2 years ago
Very good lectures but what's with the egg?
TSP105 2 years ago
LOL @ 28:10
Ahzuz 2 years ago 3
Free education right here. Where is everyone?
FatalError2319 2 years ago 7
There`s also free porn just few letters away :)
kontekzt 2 years ago
Right here but most people dont' understand this stuff...lol....but it the ones who want to learn have a computer and internet and a place to look at it have looked at it.
tgr128 2 years ago