Question

Using Stefan’s law, obtain the expression for the rate of loss of heat by a blackbody in cooler surroundings. How is this equation modified if the body is not black?​

Answer 1

Answer:

Stefan's Law states that the radiated power density (W/m2) of a black body is proportional to its absolute temperature T raised to the fourth power. E = e σ T4. The emissivity e is a correction for an approximate black body radiator, where e = 1 – R, is the fraction of the light reflected (R) by the black body.