Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively
PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are the same. The two bodies emit total radiant power at the same rate. The wavelength λB corresponding to maximum spectral radiancy in the radiation from B is shifted from the wavelength corresponding to maximum spectral radiancy in the radiation from A by 1.00μm. If the temperature of A is 5802 K:
(1) the temperature of B is 1934 K
(2) λB=1.5μm
(3) the temperature of B is 11604 K
(4) the temperature of B is 2901 K