A ray of light incident normally on an isosceles right angled prism travels as shown in the figure. The refractive index of the prism must be greater than
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a
2
b
3
c
1.5
d
2
answer is A.
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Detailed Solution
Inside the prism for total internal reflection , i>c ⇒sin i >sin c⇒sin 450 >1μ⇒μ<2 ⇒μmin=2