The electromagnetic energy emitted by a perfect radiator corresponding to a temperature T and surface area A is?(a) AσT^4Δt, in unit time Δt(b) AeσT^4Δt, in unit time Δt(c) Ae4 c) AeσT^4(d) AσT^4This question was posed to me in a national level competition.The question is from Thermal Properties of Matter in portion Thermal Properties of Matter of Physics – Class 11

The electromagnetic energy emitted by a perfect radiator corresponding

1.	The electromagnetic energy emitted by a perfect radiator corresponding to a temperature T and surface area A is?(a) AσT^4Δt, in unit time Δt(b) AeσT^4Δt, in unit time Δt(c) Ae4 c) AeσT^4(d) AσT^4This question was posed to me in a national level competition.The question is from Thermal Properties of Matter in portion Thermal Properties of Matter of Physics – Class 11
Answer» The correct OPTION is (a) AσT^4Δt, in UNIT time Δt The EXPLANATION: The relation of ENERGY is given by Stefan-Boltzman law:Energy per unit time = AσT^4, where σ is called the Stefan-Boltzman constant.∴ Energy =AσT^4Δt, in unit time Δt.

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