A small source of light is 4 m below the surface of a liquid of refractive index 5 / 3 …
Physics · JEE Main · NTA Exams — Optics
A small source of light is \(4 m\) below the surface of a liquid of refractive index \(5 / 3\). In order to cut off all the light coming out of liquid surface, minimum diameter of the disc placed on the surface of liquid is
- \(3 m\)
- \(4 m\)
- \(6 m\)
- \(\infty\)
Answer
(C) 6 m
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