Noun
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Stark effect
(physics) The splitting and shift of a spectral line into several components in the presence of an electric field.
At higher-order perturbations, however, the Bohr model and quantum mechanics differ, and measurements of the Stark effect under high field strengths helped confirm the correctness of quantum mechanics over the Bohr model. Source: Internet
A third paper, published in May, showed the equivalence of his approach to that of Heisenberg and gave the treatment of the Stark effect. Source: Internet
In addition, the Stark effect also removes the degeneracy of energy states having the same total angular momentum (specified by the quantum number J). Source: Internet