Question:
A black metal foil is warmed by radiation from a small
Last updated: 6/11/2023
A black metal foil is warmed by radiation from a small sphere at temperature T and at a distance d It is found that the power received by the foil is P If both the temperature and distance are doubled the power received by the foil will be A 16 P B 4 P D P C 2 P ns B