Question

A concave mirror has radius of curvature of . It is at the bottom of a glass that has water filled up to (see figure). If a small particle is floating on the surface of water, its image as seen, from directly above the glass, is at a distance from the surface of water. The value of is close to : (Refractive index of water

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A

B

C

D

Medium
Solution
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Correct option is A)

Light incident from particle will be reflected at mirror



This image will act as object for light getting refracted at water surface
So, object distance
below water surface,
After refraction, final image is at



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