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The absolute index of water is 1.36. Wha...

The absolute index of water is 1.36. What is the velocity of light in water ? (velocity of light in vacuum is `3xx10^(8)m//s`)

Text Solution

Verified by Experts

Given : ` " "_(w)n_("vac") =1.36`
`v_("vac")=3xx10^(8)m//s`
To find : `v_(w)=` ?
Formula : `" "_(w)n_("vac")=(v_("vac"))/(v_(w))`
Solution : `1.36=(3xx10^(8))/(v_(w))`
`v_(w)=(3xx10^(8))/(1.36)`
`v_(w)=2.21 xx 10^(8)m//s`
The velocity of light in water is `2.21 xx 10^(8)m//s`
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Knowledge Check

  • The refractive index of water is 1.33. What will be the speed of light in water?

    A
    `3 xx 10^(8) ms^(-1)`
    B
    `2.26 xx 10^(8) ms^(-1)`
    C
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    D
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  • The velocity of light in air is ………………..m/s.

    A
    `3xx10^(10)`
    B
    `3xx10^(8)`
    C
    `1.5xx10^(8)`
    D
    `0.3xx10^(8)`

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