As shown in Fig. 36-8, a light ray IO is incident on a small plane mirror. The
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As shown in Fig. 36-8, a light ray IO is incident on a small plane mirror. The mirror reflects this ray back onto a straight ruler SC which is 1 m away from and parallel to the undeflected mirror MM. When the mirror turns through an angle of 8.0° and assumes the position M'M', across what distance on the scale will the spot of light move? (This device, called an optical lever, is useful in measuring small deflections.)
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When the mirror turns through 80 the normal to it also turns through 8...View the full answer
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