Question

What’s the meaning of “emission spectra is photographic negative of absorption spectra”

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Answer 1

Here is ur answer mate

An absorption spectrum

unlike the emission spectrum, is like a photographic negative of the emission spectrum. For observing the absorption spectrum, electromagnetic radiations are bombarded on a sample which absorbs radiation of certain wavelengths. The wavelength of radiations absorbed by the matter contributes to the missing wavelength which leaves dark spaces in the bright continuous spectrum.

I hope it helps dude