A ray of light is incident on a glass sphere ofrefractive index 3/2. W – InterviewSolution

1.	A ray of light is incident on a glass sphere ofrefractive index 3/2. What should be the angleof incidence so that the ray which enters thesphere does not come out of the sphere is1) tan^-1(2/3)2) sin^-1 (2/3)3) 90°4) cos^-1 (1/3)
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