Question

A typical electromagnetic signal from a communications satellite might have an intensity of 0.600 pW/m2 at the surface of the Earth. Your satellite dish collects the energy of the electromagnetic signal from the satellite; then your dish passes that energy to its central receiver, where the signal can be processed by a circuit. The area of a satellite dish can be calculated from pi (3.1416) times the radius squared. If your satellite dish has a radius of 0.28 m, and if it is receiving the signal described above, how much electromagnetic energy is reflected to the central receiver in 2.5 minutes

Answer 1

Answer:

The answer is "22.05 pJ"

Explanation:

Using formula:

$Energy=power\times time\\\\Power=Intensity \times area$

Calculating Energy:

$=0.147 \times 2.5 \times 60 \times 10^{-12}\\\\=22.05\ pJ$