In a television picture tube, a beam of electrons is sent from the back to the front (screen) by an electron gun. When an electron strikes the screen, it causes a phosphor to glow briefly. To produce an image across the entire screen, the beam is electrically deflected up and down and left and right. The beam may sweep from left to right at a speed greater than c. Why is this not a violation of the claim that no information may travel faster than the speed of light?
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