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Q.

For water μ= 4 3/ and the velocity of light in vacuum is 3 ×108 ms–1, the time taken for light to travel a distance of 450 m in water will be(nearly)

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a

1.5μs

b

1μs

c

3μs

d

2μs

answer is C.

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Detailed Solution

μ=ctd,μw=43;Vw=3×1084×3=94×108m/st=450×49×108=2×10−6=2μs 

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For water μ= 4 3/ and the velocity of light in vacuum is 3 ×108 ms–1, the time taken for light to travel a distance of 450 m in water will be(nearly)