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

Question:

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 k_BT) ≫ 1, the maximum in a plot of ρ (λ , T) versus λ is given by λ _max = hc/5k_BT. At what wavelength does the maximum in ρ (λ, T) occur for T = 675, 1150., and 6200. K?

Distribution
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