A point source of light is placed at a depth of h below the surface of water of…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
A point source of light is placed at a depth of h below the surface of water of refractive index m. A floating opaque disc is placed on the surface of water so that light from the source is not visible from the surface. The minimum diameter of the disc is
- 2h(m2 – 1)1/2
- h(m2 – 1)1/2
Answer
(C)
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