Q.

During refraction, ray of light passes undeviated, then 

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a

medium on both sides is same 

b

angle of incidence is 90°

c

angle of incidence is 0° 

d

medium in other side is rarer

answer is A, C.

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Detailed Solution

A ray can pass undeviated when μ1=μ2 or the ray is incident normally i.e. angle of incidence is 0°.

Hence, (1),(3) are correct.

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