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At some instant and location, the electric field associated with an electromagnetic wave in vacuum has...

At some instant and location, the electric field associated with an electromagnetic wave in vacuum has the strength 99.3 V/m. Find the magnetic field strength ?, the total energy density ?, and the power flow per unit area, all at the same instant and location.

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Answer #1

SOLUTION:

EM wave consist of electric and magnetic field waves oscillating in perpendicular planes with each other and also perpendicular to the direction of propagation.

Given E=99.3V/m

If B is the magnetic field and c is the velocity of light in vaacum , then we can write

where

Therefore

Power flow per unit area= P=u*c

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