Question

what is an emission and absorption spectrum

Answer 1

The conversion of the dispersed seven colors into a beam of light by using a prism is called the absorption spectrum and the conversion of a beam of light into a spectrum of seven colors is called the emission spectrum

Answer 2

When energy in the form of light, heat, or chemical agents is given to an element, the electrons of its atoms accept the energy and go to higher energy levels. However, these electrons have to emit energy in order to return to their ground state, since the excited state is unstable. The frequencies of light emitted in such a case constitute the emission spectrum.

Electrons of an element which are in the ground state may absorb incident energy in order to reach a higher energy state. The frequencies of light transmitted through this substance, with dark bands showing absorbed light, constitute the absorption spectrum of the substance.