# physics

In a given electromagnetic plane wave the maximumelectric field strength is 400
V/m.
What is the maximum magnetic field strength? How does the energy stored
in the magnetic field compare with the energy stored in the electric field at
any given time?
how do you calculate the average intensity of the wave.
and how do you calculate the average energy density of the wave.

1. You have to have a nice summary in your electromagnetic energy chapter that summarizes this, look in the section of your text that discusses Poynting flux, or Poynting vector.

Isn't E^2=B^2 ? That is, half the energy is in the electric field and half in the magnetic field?

posted by bobpursley

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