Question
Asked Nov 3, 2019
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A radio antenna broadcasts a 1.0 MHz radio wave with 26.0 kW of power. Assume that the radiation is emitted uniformly in all directions.

a. What is the wave's intensity 30.0 km from the antenna?

b. What is the electric field amplitude at this distance?

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Expert Answer

Step 1

(a). The wave's intensity 30.0 ...

I =
4лr?
26000 W
47T (30000m
2.3 x 10
W/m
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I = 4лr? 26000 W 47T (30000m 2.3 x 10 W/m

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