Solved: Estimate the rms electric field in the sunlight

Chapter 31, Problem 43GP

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QUESTION:

Problem 43GP

Estimate the rms electric field in the sunlight that hits Mars. Knowing that the Earth receives about 1350 W/m2 and that Mars is 1.52 times farther from the Sun (on average) than is the Earth.

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QUESTION:

Problem 43GP

Estimate the rms electric field in the sunlight that hits Mars. Knowing that the Earth receives about 1350 W/m2 and that Mars is 1.52 times farther from the Sun (on average) than is the Earth.

ANSWER:

Solution 43GP

1 of 2

We have I = P / (4 * * r2) , where P is the power, I is the Intensity, r is distance.

Power radiates from sun in spherically. Power of sun is constant.

So for Earth IE =  P / (4 * * rE2)

For Mars IM  =  P / (4 * * rM2

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