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If c is velocity of light in free space,...

If c is velocity of light in free space, the time taken by the light to travel a distance x in a medium of refractive index `mu` is given by

A

`mu xc`

B

`(mu x)/c`

C

`(mu c)/x`

D

`x/mu`

Text Solution

Verified by Experts

The correct Answer is:
B
The time taken by the light to travel is,
`t=x/v=x/(c/mu)= (mu x)/c`
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Knowledge Check

  • Find the time taken by light to travel a distance of 3cm in glass. ( c=3 times 10^8 m//s and refractive index of water 4//3 )

    A
    `1.333 times 10^-10 S`
    B
    `2.333 times 10^-10 S`
    C
    `3.333 times 10^-10 S`
    D
    `4.333 times 10^-10 S`

  • If p for water is 4//3 and the velocity of light in vacuum is 3 xx 10^(8) m//s , the time taken for light to travel a distance of 450 m in water will be

    A
    `2 xx 10^(-6) m//s`
    B
    `1 xx 10^(-6) m//s`
    C
    `0.5 xx 10^(-6) m//s`
    D
    `2 xx 10^(-4) m//s`

  • For water mu=4//3 and the velocity of light in vaccum is 3 times 10^8 ms^-1 the time taken for light to travel a distance of 450m in water will be (nearly)

    A
    `1.5 mu s`
    B
    `1 mu s`
    C
    `2 mu s`
    D
    `3 mu s`

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