Lec 27 | MIT 8.02 Electricity and Magnetism, Spring 2002
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25:27 How in the world can it be a "plane wave" in the y direction? It must have some limit to the extent of its distance. I really don't see the leap of faith to assume it is constant in the y direction as far as you would like it to be. Even at 100's of kilometers? Light years? If not, then how far? Anyone know? Thanks.
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@tylerjuno Mythbusters used crystal glass which is thinner that ''normal'' glass, so easier to break. As you may also remember, they tried a lot of times. That is because some glasses contain more faults in them than others and that helps in breaking them. I think what the teacher meant is that an average more sturdy glass cannot be broken by an human voice alone.
nonetheless, the Mythbusters' episode was quite impressive.
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The end was very amusing, but I don't think he would be really heard by anyone outside that class. I mean, I guess it's such a low potency antenna, that the signal doesn't go a very long distance before being completly dumped. Therefore, only that radio very close to the antenna can get the signal.
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Does anyone know what lecture Dr. Lewin talks about inductance and magnetic field energy??
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NERD
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Can anyone explain why E and B of EM waves are always in phase? An intuitive interpretation of Maxwell's equations would be that they should be shifted 90deg in respect to each other (since each is proportional to the other's time derivative).
I know that's what the math says, just can't picture it in my head.
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First of all, how to you define a "strange" or "normal" way of writing Maxwell's equations? If the information contained within the equations is the same, then there can be no "good", "bad", "weird" or "normal" way to write them.
Also, this class is a "General Institute Requirement" (GIR) so naturally the level is not on par with more advanced lectures (which exist) of Physics or Electrical Engineering students.
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that was ballin'
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shiiiit, at a school like that ya feel like you're a part of something big
LevKozlodoev 3 years ago 8
GOOD BLESS WALTER LEWIN!
goodluckpeace44 2 years ago 7