light reflection and refraction class 10 mcq

The refractive index of glass with respect to air is 2. Then the critical angle of glass air interface is a) 0° b) 45⁰ c) 30⁰ d) 60⁰

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A hunter desires of shooting a fish whose image could be seen through clear water. His aim should be a) above the apparent shift b) below the apparent shift c) in the line of sight of fish d) parallel to surface of water.

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A fish looking at 1m highest plant at the edge of a pond. Then its actual height as seen by fish is: a) taller b) shorter c) same d) can't be say

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