The radio telescope in Arecibo, Puerto Rico, has a diameter of 305 m. It can detect radio

Question:

The radio telescope in Arecibo, Puerto Rico, has a diameter of 305 m. It can detect radio waves from space with intensities as small as 10−26 W/m2.
(a) What is the average power incident on the telescope due to a wave at normal incidence with intensity 1.0 × 10−26 W/m2?
(b) What is the average power incident on Earth's surface?
(c) What are the rms electric and magnetic fields?