PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A metal plate behaves like an ideal blackbody at 500K. Another plate of the same area and temperature has emissivity 0.25. What is the ratio of the power radiated by the second plate to that by the blackbody plate?
(a) 0.50
(b) 4.0
(c) 0.25
(d) 0.75