The surface of a household radiator has an emissivity of `0.55` and an area of `1.5 m^(2)`.
Channel: Doubtnut
Date: 2020-04-05

The surface of a household radiator has an emissivity of `0.55` and an area of `1.5 m^(2)`.  (a) At what rate is radiation emitted by the radiator when its temperature is `50^(@)C`?   (b) At what rate is the radiation absorbed by the radiator when the walls of the room are at `22^(@)C`? (c ) What is the net rate of radiation from the radiator? (stefan constant `sigma = 6 xx 10^(-8)W//m^(2)-K^(4))`