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A ray falls on a prism `ABC(AB=BC)` and travels as shown in adjoining figure.The minimum refraction index of the prism material should be -
A. 43558
B. `sqrt2`
C. 1.5
D. `sqrt3`

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Best answer
Correct Answer - B
(b) Angle I at bothfocus will be `45^(@)`. For TIR to take place,
`igttheta_(C) or sinigtsintheta_(C)`
`therefore 1/sqrt2gt1/muor mugtsqrt2`

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