Approximations to Planck's law for the spectral emissive power are the Wien and Rayleigh-Jeans spectral distributions, which
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Approximations to Planck's law for the spectral emissive power are the Wien and Rayleigh-Jeans spectral distributions, which are useful for the extreme low and high limits of the product ?T, respectively,
(a) Show that Planck's spectral distribution will have the form when C2/T >> 1 and determine the error (compared to Planck's law) for the condition ?T = 2898?m ? K. This form is known as Wien's law.
(b) Show that the Planck distribution will have the form when C/?T
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Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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