Questions
The power radiated by a black body is P and it radiates maximum energy at wavelength, . If the temperature of the black body is now changed so that it radiates maximum energy at wavelength the power radiated by it becomes nP. The value of n is
detailed solution
Correct option is C
From Wien's law, λmaxT= constant So, λmax1T1=λmax2T2⇒λ0T=3λ04T'⇒T'=43According to Stefan-Boltzmann law, energy emitted unit time by a black body is AeσT4, i.e., power radiated.∴ P∝T4 So, P2P1=T'T4⇒n=434=25681Similar Questions
If there are two bodies at different temperatures, the wavelength of radiation (in which maximum radiation energy is distributed):
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