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The power output of a 840-kHz AM radio station is 50.0 kW. If the radio waves are broadcast uniformly in all directions, find the number of photons per second per square meter at a distance of 30 km in units of 1020. Assume no reflection from the ground or absorption by the air.
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The power output of a 840-kHz AM radio station is 50.0 kW. If the radio waves are broadcast uniforml...
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