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Q.

If light travels a distance x in t1 sec in air and 10 x distance in t2 sec in a medium, the critical angle of the medium will be

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a

tan−1t1t2

b

sin−1t1t2

c

sin−110t1t2

d

tan−110t1t2

answer is C.

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Detailed Solution

From the formula sinC=1 1μ2⇒sinC=2μ1μ1μ2=v2v1⇒sinC=10x/t2x/t1=10t1t2
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If light travels a distance x in t1 sec in air and 10 x distance in t2 sec in a medium, the critical angle of the medium will be