A radio transmitter in space transmits isotropically with an average power of 170 kW. What is the average magnitude of the poynting vector 14 miles from the radio transmitter?
Answer in units of W/m^2.
I read the section on Poynting vectors twice but I haven't begun to figure out how to solve this.. Please help!|||S= P/ ( 4*pi*distance^2)
Power = 170x10^3
Distance = 14 miles * 1609 = 22526m
S = 170x10^3 / (4 * pi * 22526^2 ) is the answer in W/m^2
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