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  4. A convex lens is placed in contact with a mirror as shown. If he space between them is filled with water, its power will

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Q. A convex lens is placed in contact with a mirror as shown. If he space between them is filled with water, its power willPhysics Question Image

Ray Optics and Optical Instruments

Solution:

The power of the given system is a combination of the positive power of the convex lens, negative power of the plane mirror. Clearly, the power of the system decreases.