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3.14 Wien's law The maximum in the intensity distribution of black body radiation depends on the temperature. Substitute x = k/(hc) in Planck's law in Equation 3.9 and plot I, versus x and find max which corresponds to the
peak of the distribution, and hence derive Wien's law. Find the peak intensity wavelength max for a 40 W light bulb given that its filament operates at roughly 2400 °C.

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