If a magnet is held near the screen of a CRT (see Sec. 16.5), the picture is
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If a magnet is held near the screen of a CRT (see Sec. 16.5), the picture is distorted. [Don't try this—see part (b).]
(a) Why is the picture distorted?
(b) With a color CRT, the distortion remains even after the magnet is removed. Explain. (A color CRT has a metal mask just behind the screen with holes to line up the electrons from different guns with the red, green, and blue phosphors. Of what kind of metal is the mask made?)
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a The picture is distorted because the magnetic field from the magnet affects the electron beams ins...View the full answer
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Related Book For
College Physics With An Integrated Approach To Forces And Kinematics
ISBN: 978-1260547719
5th Edition
Authors: Alan Giambattista
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