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Excitation spectrum of electric light source

The excitation spectrum refers to the variation in the intensity of a specific spectral line or band of luminescence as a function of the wavelength (or frequency) of the excitation light.

Thus, the excitation spectrum reflects the effect of light excitation of a material at different wavelengths; in other words, it indicates the material's responsiveness to different excitation wavelengths.

This refers to the relative radiant power generated per unit input power at a specific wavelength.

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