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  4. A person 6 feet in height can see his full size erect image in a mirror 2 feet in height. This mirror has to be

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Q. A person 6 feet in height can see his full size erect image in a mirror 2 feet in height. This mirror has to be

Ray Optics and Optical Instruments

Solution:

To see an erect, virtual, diminished image, we can use a convex mirror. To see the full image of an object of height h, a plane mirror of $\frac{h}{2}$ atleast is required. Concave mirror produces an enlarged image if it is virtual.