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

Explain emission lines and absorption lines.

Explain emission and absorption spectrum

Distinguish between action spectrum and absorption spectrum.

The wavelength of a line a spectrum is inversely proportional to

Differentiate absorption spectrum and action spectrum.

From which source a continuous emission spectrum and a line absorption spectrum are simultaneously obtained

Distinguish between emission and absorption spectrum.

Which of the following gives neither emission spectrum nor absorption spectrum?