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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 `45^(@)`. The ray undergoes total internal reflection. If n is the refractive index of the medium with respect to air, select the possible value (s) of n from the following

A

1.3

B

1.4

C

1.5

D

1.8

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The correct Answer is:
C
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