# What is emission line spectrum?

Jun 1, 2017

i will solve this

#### Explanation:

A spectral line is a dark or bright line in a uniform and continuous spectrum, the result of an excess or a lack of photons in a narrow range of frequencies, compared to the near frequencies. When there is an excess of photons there is talk of an emission line

Jun 1, 2017

It is the 'decomposition' of light in a prism. Lines conform the spectrum.

#### Explanation:

There are emission and absorption lines

The emission spectrum of a chemical element or compound is the 'range' of frequencies of electromagnetic radiation (emitted by an atom or molecule passing from a high energy state (excited state) to a lower one or configuration with less energy).

An emission line appears in a spectrum if the source emits specific radioactive wavelengths.

A useful formula: The energy of the photon emitted is equal to the energy difference between the states.

${E}_{\text{photon}} = {E}_{1} - {E}_{2}$