An emission line results from an electron falling from a higher to lower energy orbital around its atomic nucleus.

Name: An emission line results from an electron falling from a higher to lower energy orbital around its atomic nucleus.
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An emission line is produced when an electron transitions from a higher energy orbital to a lower energy orbital around its atomic nucleus, releasing a photon of light with a wavelength characteristic of the energy difference between the two orbitals.

An Emission Line Results from an Electron Falling from a Higher