a)The earth is in a state of balance where the radiated energyfrom the Earth balances the incident energy from the Sun. Determinethe effective temperature of the Earth (neglecting the GreenhouseEffect).
b) Due to gases in the atmosphere approximately 150Wm^-2 isre-radiated back to the surface. Using the Stefan-Boltzmannexpression, show that the global mean temperature of hte earth'ssurface is approximately 15 degrees (Celcius). Why does this answerdiffer from part a)? (Hint you will need to recalculate the Powerdensity to determine the amount of surface radiation before usingthe Stefan-Boltzmann equation). Stefan-Boltzmann constant = 5.672 *10^-8 W/m^2K^4
