A ray of light goes from medium A to Med...

A ray of light goes from medium A to Medium B. The angle of incidence is `30^@` and the angle of refraction is `45^@`. Find the ratio `v_A//v_(B')` where `v_A` is the speed of light in Medium A and `v_B` is the speed of light in medium B.

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`1/sqrt2`

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