A black body at a high temperature T radiates energy at the rate of U (in  `Wm^(-2)` ).
Channel: Doubtnut
Date: 2020-05-24

A black body at a high temperature T radiates energy at the rate of U (in  `Wm^(-2)` ). When the temperature falls to half  (I e .  `(T)/(2)` ) the radiated energy (in  `Wm^(-2)` ) will be