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Q.

Light takes time t1 to travel a distance x1 in vacuum and the same light takes time t2 to travel a distance x2 in a medium. The critical angle for the medium is

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a

sin1x2t2x1t1

b

sin1x1t2x2t1

c

sin1x1t1x2t2

d

sin1x2t1x1t2

answer is D.

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Detailed Solution

C=Sin1μ1μ2=Sin1V2V1=Sin1x2+1x1+2

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