Question
A radio antenna broadcasts a 1.0 MHz radio wave with 25 kW of power. Assume that the radiation is emitted uniformly in all directions. (a)
A radio antenna broadcasts a 1.0 MHz radio wave with 25 kW of power. Assume that the radiation is emitted uniformly in all directions. (a) What is the wave's intensity 30km from the antenna?
A) 2.2 * 10^-6 W/m^2
B) 4.2 * 10^-4 W/m^2
C) 1.2 * 10^-3 W/m^2
D) 3.2 * 10^-5 W/m^2
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Fundamentals of Physics
Authors: Jearl Walker, Halliday Resnick
10th Extended edition
978-1118230718, 111823071X, 978-1118230725
