The distribution in wavelengths of the light emitted from a radiating blackbody is a sensitive function of

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The distribution in wavelengths of the light emitted from a radiating blackbody is a sensitive function of the temperature. This dependence is used to measure the temperature of hot objects, without making physical contact with those objects, in a technique called optical pyrometry. In the limit (hc/λ kBT) ≫ 1, the maximum in a plot of ρ (λ , T) versus λ is given by λ max = hc/5kBT. At what wavelength does the maximum in ρ (λ, T) occur for T = 675, 1150., and 6200. K? 

Distribution
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Physical Chemistry

ISBN: 978-0321812001

3rd edition

Authors: Thomas Engel, Philip Reid

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