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23 Nov 2019
A solar sail is made of aluminized Mylar having an emissivity of0.03 and reflecting 97% of the light that falls on it. Suppose asail with area 1.10 km2 is oriented so that sunlight fallsperpendicular to its surface with an intensity of 1.40 103 W/m2. Towhat temperature will it warm before it emits as much energy (fromboth sides) by radiation as it absorbs on the sunny side? Assumethe sail is so thin that the temperature is uniform and no energyis emitted from the edges. Take the environment to be 0 K. (s =5.6696 10-8 W/m2·K4)
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A solar sail is made of aluminized Mylar having an emissivity of0.03 and reflecting 97% of the light that falls on it. Suppose asail with area 1.10 km2 is oriented so that sunlight fallsperpendicular to its surface with an intensity of 1.40 103 W/m2. Towhat temperature will it warm before it emits as much energy (fromboth sides) by radiation as it absorbs on the sunny side? Assumethe sail is so thin that the temperature is uniform and no energyis emitted from the edges. Take the environment to be 0 K. (s =5.6696 10-8 W/m2·K4)
___________________ K
Bunny GreenfelderLv2
16 Jul 2019
