Geometrical OpticsEasy
Question
A point source of light is place 4 m below the surface of water of refractive index 5/3. The minimum diameter of a disc which should be placed over the source on the surface of water to cut-off all light coming out of water is (μ = 5/3)
Options
A.2 m
B.6 m
C.4 m
D.3 m
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