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(B) white hot solid emits a continuous spectrum containing all wavelengths of visible light.When this light passes through a sodium flame (sodium vapo

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Two dark lines in the yellow region

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(B) white hot solid emits a continuous spectrum containing all wavelengths of visible light.When this light passes through a sodium flame (sodium vapour),the sodium atoms absorb specific wavelengths corresponding to their characteristic emission lines ($D_1$ and $D_2$ lines).As a result,these specific wavelengths are removed from the continuous spectrum,appearing as two dark lines in the yellow region of the otherwise continuous spectrum.This phenomenon is known as an absorption spectrum.

When light emitted by a white hot solid is passed through a sodium flame,the spectrum of the emergent light will show

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