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A point object O is placed in fornt of a...

A point object O is placed in fornt of a transparent slab at a distance x from its surface. It is seenfrom the other side of he slab by light incident nearlyl normally to the slab. The thickness of the slab is t and its refractive index is `mu`. Show that the apparent shift in the position of the object is independent of x and find its value.

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