Question: 1. Use the Planck distribution function for spectral density per unit volume (equation 7A.6a) to calculate the energy density in the range from 650 nm

1. Use the Planck distribution function for spectral density per unit volume (equation 7A.6a) to calculate the energy density in the range from 650 nm to 655 nm from a blackbody of volume 100 cm when its temperature is (a) 25C, (b) 3000C. This wavelength range is so small that the density per unit volume can be estimated by r(650 nm, T)DI

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