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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. `4//3`
B. `sqrt2`
C. `3//2`
D. `sqrt3`

1 Answer

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Best answer
Correct Answer - B
image
Since `AB=BC`, `/_BAC=/_ACB=45^@`
T.I.R. takes place at AB and BC i.e.
`45^@geC`
`sin45^@gesinC`
`1/sqrt2ge1/mu`
`mugesqrt2`
`mu_(min)=sqrt2`

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