If the temperature decreases by a factor of 2, how much will the energy decrease? We have two relations for the energy from the two different temperatures. Eold = o(Told) 4 Enew = σ(Tnew) 4 We know that if the new temperature is n times less than the old temperature then: Told Using this in our expression for Eld gives: =nT new Eold = n²o (Tnew) 4 new = 4²old n So, the energy will decrease by a factor of

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Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.