A ray of light travelling in a transparant medium falls on a surface separating the medium from air at an angle of incidence of `45degree`. The ray undergoes total internal reflection. If n is the refractive in index of the medium with respect to air, select the possible value (s) of n from the following:A. 1.3B. 1.4C. 1.5D. 1.6

A ray of light travelling in a transparant medium falls on a surface s

1.	A ray of light travelling in a transparant medium falls on a surface separating the medium from air at an angle of incidence of `45degree`. The ray undergoes total internal reflection. If n is the refractive in index of the medium with respect to air, select the possible value (s) of n from the following:A. 1.3B. 1.4C. 1.5D. 1.6
Answer» Correct Answer - C::D KEY CONCEPT: For total internal reflection to take place: Angle of incidence `igt` critical angle, `theta_(c)` or `sin45degreegt(1)/(n)` or `(1)/(sqrt2)gt(1)/(n)` or `ngtsqrt2` or `ngt1.414`. Therefore, possible values of n can be 1.5 or 1.6 in the given options.

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