What is the minimum value of the refractive index for a 90∘–45∘� – InterviewSolution

1.	What is the minimum value of the refractive index for a 90∘–45∘–45∘ prism which is used to deviate a beam through 90∘ by total internal reflection ?
Answer» What is the minimum value of the refractive index for a $90^{\circ} - 45^{\circ} - 45^{\circ}$ prism which is used to deviate a beam through $90^{\circ}$ by total internal reflection ?

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