Samsung Electronics

Such tubes operate by forming the electrons emitted from the cathode into a skinny beam that impinges on a fluorescent display screen at the finish of the tube. The display screen emits gentle that may be seen from outside the tube. Deflecting the electron beam causes patterns of sunshine to be produced on the screen, creating the desired optical images. In operation, the anode in such a vacuum tube is given a constructive potential with respect to the cathode, whereas the grid is negatively biased.

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