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mikefitz

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**The Sun emits electromagnetic waves (including light) equally in all directions. The intensity of the waves at the Earth's upper atmosphere is 1.4 kW/m2. At what rate does the Sun emit electromagnetic waves? (In other words, what is the power output?)**

I = P/A

I know I need to convert 1.4kW/m^2 ==> 1400W/m^2

Then I set that value = to P/A

What I'm unclear about is, what is the Area I am supposed to insert in the equation?