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Q.

If the critical angle for total internal reflection from a medium to vacuum is 45°, then velocity of light in the medium is,

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a

3 × 108 m/s

b

1.5 × 108 m/s

c

32x 108 m/s

d

2x108 m/s

answer is C.

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Detailed Solution

sin⁡C=1μsin⁡45∘=1μ12=1μμ=2Velocity of light in mediumv=cμv=3×1082m/s
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