In the figure shown , for an angle of incidence `45^(@)`, at the top surface , what is the minimum refractive index needed for the internal reflection at vertical face ? A. `(sqrt(2)+1)/(2)`B. `sqrt(3/2)`C. `sqrt(1/2)`D. `sqrt(2)+1`

In the figure shown , for an angle of incidence `45^(@)`, at the top s

1.	In the figure shown , for an angle of incidence `45^(@)`, at the top surface , what is the minimum refractive index needed for the internal reflection at vertical face ? A. `(sqrt(2)+1)/(2)`B. `sqrt(3/2)`C. `sqrt(1/2)`D. `sqrt(2)+1`
Answer» Correct Answer - b

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In the figure shown , for an angle of incidence `45^(@)`, at the top surface , what is the minimum refractive index needed for the internal reflection at vertical face ? A. `(sqrt(2)+1)/(2)`B. `sqrt(3/2)`C. `sqrt(1/2)`D. `sqrt(2)+1`

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