Question

2000 calories of radiant heat is incident on a body. If the body absorbs 550 calories of heat, find the coefficient of emmission of the body.

Answer 1

Given: Q = 2000 cal, Q_a = 550 cal

We have,

`a=Q_a/Q=550/2000`

`=11/40=0.275`

By Kirchhoff's law of radiation

a = e

e = 0.275