write a short note on. (a)vaccum phototubes (b) photomultiplier tubes (c)silicone diode detectors
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a) A phototube or photoelectric cell is a type of gas-filled or vacuum tube that is sensitive to light. .The photomultiplier tube is one of the most sensitive light detectors, and is still widely used in physics research.
b) Photomultiplier tubes members of the class of vacuum tubes, and more specifically vacuum phototubes, are extremely sensitive detectors of light in the ultraviolet
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