PHYSICS · Multi-part · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
Answer the following:
(1) State the Stefan–Boltzmann law for power radiated from a hot object.
(2) The Sun has a surface temperature of about 5770K and a radius of 6.96×108m. Assuming that the Sun behaves as a black body with emissivity one, calculate its total power radiated into space.
(3) The Earth orbits the Sun at a mean distance of 1.496×1011m. Calculate the solar power per square metre incident on the upper atmosphere of the Earth.