The function describing energy emitted by a light source as a function of wavelength is called its

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The spectral power distribution describes the amount of energy emitted by a light source at each wavelength. The other options are not accurate descriptions of this function. Spectral reflectance function describes the amount of light reflected by a surface at each wavelength, color spectrum refers to the visible colors produced by a light source, and the illuminant function typically refers to the spectral power distribution of a standard light source used in color measurement.

The Function Describing Energy Emitted by a Light Source as a Function