A point source is placed at a depth 20 cm below the surface of water. The light escapes through a circular area of the water with its centre directly above the point source. (µ = 4/3)
(i) The angle subtended by a diameter of the area on the source –
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Ans.
(i)
Sol.98 0
(ii)
Sol.2.8m
(iii)
Sol. Shadow of the ring will not form
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