How Do Electric Fields Affect The Way Light Is Absorbed And Emitted? #physics

How do electric fields alter the absorption and emission spectra of light? The Stark effect is the shifting and splitting of spectral lines of atoms and molecules due to the presence of an external electric field. Although initially defined for a static electric field it is used in a wider context to describe the effect of time-dependent electric fields. It is responsible for the pressure broadening of spectral lines by charged particles in plasmas. The stark effect can be observed both for emission and absorption lines.

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