The radiation energy (intensity of the radiation) reaching Earth from the sun at the top of the atmosphere is 1.36×103??2⁄, which is called the solar constant. Assuming that Earth absorbs the total power coming from the Sun to the Earth and radiates with the emissivity of 0.8 at a uniform temperature around the Earth, what would the equilibrium temperature of Earth be?

The radiation energy (intensity of the radiation) reaching Earth from the sun at the top of the atmosphere is 1.36×103??2⁄, which is called the solar constant. Assuming that Earth absorbs the total power coming from the Sun to the Earth and radiates with the emissivity of 0.8 at a uniform temperature around the Earth, what would the equilibrium temperature of Earth be?