Distinguish between an absorption spectrum and an emission spectrum.with which did bohr work?

Answer 1

In absorption spectra, one works with measuring the amount of energy absorbed when an electron moves from a lower to a higher energy level. In emission spectra, one works with the energy emitted when an electron moves from a higher to a lower energy level. Niels Bohr worked with emission spectra.

Answer 2

He worked on emission Spectra