ABC is a right angled glass prism of refractive index 1.5. angleA , angleB and angle C are 60^@, 30^@ and 90^@ respectively. A thin layer of liquid is on the face AB. For a ray of light which is incident normally on AC to be totally reflected at AB, the refractive index of the liquid on AB should be

ABC is a right angled glass prism of refractive index 1.5. angleA , an

1.	ABC is a right angled glass prism of refractive index 1.5. angleA , angleB and angle C are 60^@, 30^@ and 90^@ respectively. A thin layer of liquid is on the face AB. For a ray of light which is incident normally on AC to be totally reflected at AB, the refractive index of the liquid on AB should be
Answer» 1.5 1.4 1.3 0.12 Answer :C

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