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Radiation emitted by a surface is directly proportional to (a) Third power of its temperature (b) Equal to its temperature (c) Twice power of its temperature (d) Fourth power of its temperature

Radiation emitted by a surface is directly proportional to
(a) Third power of its temperature
(b) Equal to its temperature
(c) Twice power of its temperature
(d) Fourth power of its temperature

Grade:Upto college level

2 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
3 years ago
Dear student

The answer is option d

Regards
Vikas TU
14149 Points
3 years ago
According to Stefan Boltzmann law, the amount of radiation emitted per unit time from an area A of a black body at absolute temperature T is directly proportional to the fourth power of the temperature. where e = emissivity (which is equal to absorptive power) which lies between 0 to 1.

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