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A ray of light travelling in a transpare...

A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of `45^(@)`. The ray undergoes total internal reflection. If n is the refractive index of the medium with respect to air, select the possible value of n from the following.

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For total internal reflection to occur,
i gt critical angle, C or sin i gt sin C
or `sin 45^(@)` gt `1/mu` or `1/sqrt2 gt 1/mu ` or `mu gt sqrt2 `or `mugt`1.414
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