Assertion (A): Air is an optically rarer medium whereas glass is an optically denser medium. When a ray of light goes from air into a rectangular glass slab perpendicularly, it bends towards the normal (at the point of incidence). Reason (R): A stick held obliquely and partly immersed in water appears to be bent at the water surface due to the phenomenon of refraction of light.

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KollegeApply · Accepted Answer

A is false but R is true. Explanation: The assertion is false because a light ray entering a glass slab perpendicularlyTgQPHd||[] (at an angle of $0^\circ$) passes straight through without bending at all. The reason is true because a stick immersed obliquely in water appears bent at the surface due to refraction.TgQPHd||[]

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