Question

# A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence 45$$^{\circ}$$. The ray undergoes total internal reflection. The possible value of refractive index of the medium with respect to air is

A
1.245
B
1.324
C
1.414
D
1.524

Solution

## The correct option is C 1.414$$\mu_{medium} \times \sin 45^{\circ} =\mu_{air}$$$$\dfrac{\mu_{medium}}{\mu_{air}}=\dfrac{1}{\sin 45^{\circ}}=\sqrt{2}=1.414$$Physics

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