When E and B are the amplitudes of the electric and magnetic fields in an electromagnetic wave in vacuum, the total average energy density in the wave is

A.

.

B.
.

C.
?0E2.

D.
.

E.
.


Answer: B

Physics & Space Science

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If a negative charge is placed inside a hollow isolated conductor that is originally neutral and the charge does not touch that conductor at any time:

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Does all electromagnetic radiation travel at the speed of light?

What will be an ideal response?

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Which of the following best represents the energy transformations in a coal-fired electric power plant?

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