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Hamamatsu Corp. - Mid-Infrared LED 11/24 LB
Photonics Dictionary

Stark effect

The splitting or shifting of spectral lines or energy levels caused by the application of a strong transverse electrical field. It often is studied with a canal-ray tube that has a third electrode behind the cathode that may be given a high positive potential to impose the required field upon the radiating canal-ray particles.
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