Question

A body radiates 5w energy at a temperature of 400 k. If the temperature is increased to 1200 k, then it radiates energy at the rate of :

Answer 1

Answer:

5w energy = 400k

1k =5/400

1k = 0.0125W

so, 1200k =0.0125× 1200

= 15W of energy.

Answer 2

All objects with a temperature above absolute zero (0 K, -273.15 oC) emit energy in the form of electromagnetic radiation. A blackbody is a theoretical or model body which absorbs all radiation falling on it, reflecting or transmitting none.