The wavelength of the emission line spectrum | vedclass

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(C) When an electromagnetic wave is passed through a material,it absorbs waves of specific wavelengths,which appear as dark lines on a photographic fi

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They are equal

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(C) When an electromagnetic wave is passed through a material,it absorbs waves of specific wavelengths,which appear as dark lines on a photographic film. This is known as the absorption line spectrum.When this material is subsequently heated or excited in a vacuum,it emits the same wavelengths that were previously absorbed. When this emitted light is projected onto a photographic film,it produces bright colored lines at the exact positions where the dark lines appeared in the absorption spectrum. This is known as the emission line spectrum.Therefore,the wavelengths of the waves absorbed and emitted by a substance are identical.

The wavelength of the emission line spectrum and the absorption line spectrum of a substance are related as:

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