A point source of light us kept below the surface of water (n_w=4/3) at a depth of \sqrt 7 m. The radius of the circular bright patch of light noticed on the surface water is....m

KCET 2012 Physics Solved Paper

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A point source of light us kept below the surface of water (nw=

) at a depth of √7m. The radius of the circular bright patch of light noticed on the surface water is....m

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