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Related to photorefractive effect: Photovoltaic effect
photorefractive effect[‚fōd·ō·ri′frak·tiv i′fekt]
An effect displayed by many electrooptic materials in which a change in the index of refraction is induced by the presence of light, and this change is retained for a time after the light exposure ceases.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.