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Answer for the clue "Change in the electrical conductivity of a substance as a result of absorbing electromagnetic radiation ", 17 letters:
photoconductivity

Word definitions for photoconductivity in dictionaries

Wiktionary Word definitions in Wiktionary
n. (context physics English) An increase in the electrical conductivity of a material as a result of incident electromagnetic radiation

Wikipedia Word definitions in Wikipedia
Photoconductivity is an optical and electrical phenomenon in which a material becomes more electrically conductive due to the absorption of electromagnetic radiation such as visible light , ultraviolet light, infrared light, or gamma radiation . When light ...

WordNet Word definitions in WordNet
n. change in the electrical conductivity of a substance as a result of absorbing electromagnetic radiation [syn: photoconduction ]