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iridescence
(redirected from Chromatic shift)

    Also found in: Medical, Wikipedia 0.04 sec.
iridescence (ĭr'ədĕs`əns), exhibition of rainbowlike colors on a surface. It usually results from interference interferometer. When the wavelength of the light is known, the interferometer indicates the thickness of the film by the interference patterns it forms. The reverse process, i.e., the measurement of the length of an unknown light wave, can also be carried out by the interferometer.
..... Click the link for more information.  when light composed of different wavelengths is reflected from the superficial layers of organic or inorganic substances, e.g., minerals, mother-of-pearl, and the feathers of birds. Iridescence greatly enhances the value of certain gems.
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