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The Earth has a surface temperature around 270 K and an emissivity of 0.8, while space has a temperature of around 2 K.
Use Stefan's law: P(net) = 5.67×10-8 W/K4 m2 *A*e*(T4 - To4) to solve the following questions.
(Radii of the Earth and the Sun are Re = 6.38×106 m, Rs = 7×108 m.)
(b) If the Earth is in thermal equilibrium, how much power must the Earth absorb from the Sun?
I know that this means that net flux is zero, that heat in equals heat out.
So how can i use Stefan's law to help me solve this?
Use Stefan's law: P(net) = 5.67×10-8 W/K4 m2 *A*e*(T4 - To4) to solve the following questions.
(Radii of the Earth and the Sun are Re = 6.38×106 m, Rs = 7×108 m.)
(b) If the Earth is in thermal equilibrium, how much power must the Earth absorb from the Sun?
I know that this means that net flux is zero, that heat in equals heat out.
So how can i use Stefan's law to help me solve this?