A photocell in the form of a vacuum tube or gas-filled tube with a photoemissive cathode and an anode.
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| 单词 | θ78530 |
| 释义 | the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > cathode-ray tube > [noun] > phototube (3) phototube1930 A photocell in the form of a vacuum tube or gas-filled tube with a photoemissive cathode and an anode. photomultiplier1940 A phototube in which the small current from the photocathode is multiplied by a succession of secondary electrodes, so that light of very low… Subcategories:— allowing passage of current (1) |
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