NEET Physics Ray Optics and Optical Instruments Questions Solved

Light enters at an angle of incidence in a transparent rod of refractive index n. For what value of the refractive index of the material of the rod the light once entered into it will not leave it through its lateral face what so ever be the value of angle of incidence 

(a) n>2                        (b) n=1

(c) n=1.1                        (d) n=1.3

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