Question

A black body at a high temperature T K radiates energy at the rate of E Wm^-2. When the temperature falls to T/2 K, the radiated energy will be ___________

(a) E/4

(b) E/2

(c) 2E

(d) E/16

Answer 1

Right choice is (d) E/16

Explanation: E^‘/E=((T/2)/T)^4=1/16

E^‘=E/16.