Question

please answer fast.

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Answer 1

Answer:

Option B : nA<nB is correct

In first image...

angle of refraction = angle of incidence

Means, both the mediums are Air only

therefore, A medium is Air.

But in 2nd image... the refracted ray..moves towards the normal..

therefore.. Medium B is denser than Air

But A medium is also Air

therefore..medium B is denser than medium A

Now..it's straight forward that denser medium has high refractive index.

Hence.. nB is more than nA

hence, nA<nB

therefore.. option B

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