A 100-kW radio station emits EM waves in all directions from an antenna on top of a mountain.What is the intensity of the signal at a distance of 10 km?

Name: A 100-kW radio station emits EM waves in all directions from an antenna on top of a mountain.What is the intensity of the signal at a distance of 10 km?
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Question

Quizplus · Accepted Answer

The intensity (I) is calculated using the formula I = P / (4πr²), where P is the power (100,000 W) and r is the distance (10,000 m). This gives I = 100,000 / (4π(10,000)²) = 8 * 10^-5 W/m².

A 100-KW Radio Station Emits EM Waves in All Directions