It bas been proposed to place solar-power-collecting satellites in earth orbit. The power they collect would be

Question:

It bas been proposed to place solar-power-collecting satellites in earth orbit. The power they collect would be beamed down to the earth as microwave radiation. For a microwave beam with a cross-sectional area of 36.0 m2 and a total power of 2.80 kW at the earth's surface, what is the amplitude of the electric field of the beam at the earth's surface?