NEET Physics Ray Optics and Optical Instruments Questions Solved


A ray of light is incident on the hypotenuse of a right-angled prism after travelling parallel to the base inside the prism. If μ is the refractive index of the material of the prism, the maximum value of the base angle for which light is totally reflected from the hypotenuse is 

(a) sin-11μ                             (b) tan-11μ

(c) sin-1μ-1μ                         (d) cos-11μ

(d) If α = maximum value of base angle for which light is totally reflected form hypotenuse.

                  

      90°-α= C = minimum value of angle of incidence at hypotenuse for total

       internal reflection

        sin90°-α=sin C=1μcos α=1μα=cos-11μ

Difficulty Level:

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