noun, Photography.
an exposure meter using a photocell for the measurement of light intensity.


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  • Photoelectric-tube

    noun, Electronics. 1. . [foh-tuh-toob, -tyoob] /ˈfoʊ təˌtub, -ˌtyub/ noun, Electronics. 1. an with a photosensitive cathode, used like a photocell. /ˈfəʊtəʊˌtjuːb/ noun 1. a type of photocell in which radiation falling on a photocathode causes electrons to flow to an anode and thus produce an electric current

  • Photoelectron

    [foh-toh-i-lek-tron] /ˌfoʊ toʊ ɪˈlɛk trɒn/ noun, Physics. 1. an emitted from a system by the photoelectric effect. /ˌfəʊtəʊɪˈlɛktrɒn/ noun 1. an electron ejected from an atom, molecule, or solid by an incident photon photoelectron (fō’tō-ĭ-lěk’trŏn’) An electron released or ejected from a photoelectric substance, having absorbed energy from incoming light.

  • Photoelectrotype

    [foh-toh-i-lek-truh-tahyp] /ˌfoʊ toʊ ɪˈlɛk trəˌtaɪp/ noun 1. an made by photographic means. /ˌfəʊtəʊɪˈlɛktrəʊˌtaɪp/ noun 1. an electrotype mode using photography

  • Photoemission

    [foh-toh-i-mish-uh n] /ˌfoʊ toʊ ɪˈmɪʃ ən/ noun, Physics. 1. . /ˌfəʊtəʊɪˈmɪʃən/ noun 1. the emission of electrons due to the impact of electromagnetic radiation, esp as a result of the photoelectric effect photoemission (fō’tō-ĭ-mĭsh’ən) See photoelectric effect.

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