The wavelength at which the Sun emits its most intense light is about 550 nm. (The Sun's data can be found on the inside back cover of the book; use Stefan's Law to calculate the power.) a) Assuming the Sun radiates as a perfect blackbody, estimate its surface temperature. b) Assuming the Sun radiates as a perfect blackbody, estimate its total emitted power.

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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.