2. The emissive power varies with wavelength, the total spectral blackbody power does not. A. True...

2. The emissive power varies with wavelength, the total spectral blackbody power does not. A. True B. False

Expert Solution

Answer: TRUE

Explanation: The spectral emissive power is defined as the radiation energy emitted by a blackbody at absolute temperature T per unit surface area, per unit time and per unit wavelength about a specific wavelength .

It is given as;

The above relation is called the Planck distribution.

Hence, total spectral emissive power varies with wavelength, since it is calculated for a specific wavelength.

Total spectral blackbody emissive power is the integral sum of the spectral emissive power over the entire wavelength spectrum. Hence it is the sum total of all spectral emissive power associated with all the wavelengths. Hence it is independant upon the wavelength and is given as;

samet mamat answered 2 years ago

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