Question

The temperature of a body in increased from `27^(@)C` to `127^(@)C`. By what factor would the radiation emitted by it increase?

Answer 1

Here, `T_(1) = 27+273 = 300K`
`T_(2) = 127+273 = 400K`
`(E_2)/(E_1) = (sigma T_(2)^(4))/(sigma T_(1)^(4)) = ((400)^(4))/((300)^(4)) = 256/81 = 3.16`.