Energy by radiation as it absorbs on the sunny side


A solar sail is made up of aluminized Mylar having an emissivity of around 0.03 and reflecting 97% of the light that falls on it. Assume that a sail having area 1.10 km2 is oriented so that sunlight falls perpendicular to its surface having an intensity of around 1.40 x 103 W/m2. To what temperature will it warm before it emits as much energy (from both the sides) by radiation as it absorbs on the sunny side? Suppose that the sail is so thin that the temperature is uniform and no energy is emitted from the edges. Take the environment to be 0 K. (s = 5.6696 x 10-8 W/m2•K4)

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Physics: Energy by radiation as it absorbs on the sunny side
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