Question:
A point source of light is place 4 m below the surface of
Last updated: 5/30/2023
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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 5 3 1 2 m 2 6 m 3 4 m 4 3 m