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Simple microscope is used for watch repa...

Simple microscope is used for watch repairs.

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(i) A magnifying glass works on the principle of simple microscope.
(ii) When an object is placed within the focal length of a convex lens we get a virtual, erect and magnified image on the same side of the lens.
(iii) This principle is used by the watch repairer t o see the small parts more clearly. Hence, watchmakers use a magnifying glass while repairing wristwatches.
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