Lec 30 | MIT 8.02 Electricity and Magnetism, Spring 2002

[WarringGod]

i think he has bumps on his ruler on one side so that its jumpy --maybe,,?

[stewitr]

@WarringGod No, he does it free hand also.

[ROBwithaB]

SORRY.

At 50:10

ironic that my eyes should be playing tricks on me....

[ROBwithaB]

What I would like to understand is the phenomenon that occurs near the end of the video (51:28) where you walk in front of the (by now strongly yellow) circle of projected light. The transitional area between the shadow and the projected light is not only blurred and less bright than the circle (presumably as a result of diffraction) but is also noticeably redder.

It is an effect I've noticed before in real life settings, and hope that someone could explain it to me.

[ROBwithaB]

P.S. the jumpy staccato chalk trick is pretty cool too.

I'd like to see a video with a full scientific explanation of THAT effect !

(Might involve the coefficient of friction between chalk and blackboard, pressure exerted by the hand, elasticity of the muscles in the arm and of the chalk itself and optimal speed of the chalk to yield a sympathetic resonant frequency based on the angle of attack of the chalk.)

SOMEBODY help me out here.....

[ROBwithaB]

Thanks prof.

You make this entertaining and understandable even for a layperson.

It boggles my mind that a resource like this MIT series, with some of the best minds on earth available for FREE, has fewer views than the various "perpetual motion" videos out there (or even some of MY videos, I'm embarrassed to admit).

[NOCOMPLACENCYCOM]

wonderful lecture on the polarization of light, thank you!

[chennanium]

thank you professor, a nice lecture!

[chennanium]

thank you professor, a nice lecture!

[luzzie9]

Eureka, I finally understand linear polarization of EM radiation. Amazing....this lecture should be a

requirement for all physics majors.

[freethisone]

see my movie and see i learned

[kakkannon]

i wanna know how the fuck he makes his chalk do that dotted line. haha

[1337ASM]

its the angle of attack, he does that dotted line by having teh chalk at a angle of somet like 80+'c ..

[mrmagic112233]

@kakkannon yeah, I was paying more attention to that than the linear polarization of EM

[freethisone]

by working forrward in the propagation of the single photo in this direction >> we can contain the light within, and coupled to the electromotive force of the magnetic field lines within the vacume tube. i propse useing sulfer as the median for the light to polorize within the CRT tube.

[freethisone]

electrons and polarized blue light couple, and are in phase with each others wavelength within the vacuum tube.resonant coils and higher energy plasma spark type gaps will be the preferred understanding and we work to this goal.

[freethisone]

if this plasma-tron can be reproduces in a ruby solid boule, we would have a huge amount of energy that its magnitude, and speed has a higher amount of electrons in comparison to polarization. for now i will only use our observations in relation with the plasmatron a new energy source.

[freethisone]

i mentioned lesson 29, now take a look at 30 in relation to the inner workings of the plasma-tron.

[freethisone]

lol use a water mister to add the drplets to the smoke

[hexofans]

Wish i was in USA to learn there...

[goodluckpeace44]

thats smoke my god its large

[afifaafzal]

these are lucky students who are taking his lectures while sitting infront of him

[dduble07]

is this the same guy doing the 8.01 physics? who usually wears blue shirts? and has very popular videos like 60,000 views and does cool experiments like shoots a gun, rides a ball, drops apples,

[kdaveem]

I love seeing the hands on stuff.

Its very nice you have made all these lessons available to everyone. Thanks!

[ralvanperu]

the best sunset in my life, actually i remember another one, i was 15...

[Sayersman1]

wot a lecture, one of the best, wicked!