Please explain

Asked by  | 21st Mar, 2009, 11:23: AM

Expert Answer:

 


Phototube.
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A photoemissive cell, commonly known as a phototube, makes use of the photoelectric effect, the phenomenon whereby light-sensitive surfaces give off electrons when struck by light. Photoemissive cells are sometimes called photocells or electric eyes. A phototube consists of a vacuum tube, housed in glass or quartz, containing two electrodes: a curved surface called…

Answered by  | 27th Mar, 2009, 12:14: PM

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