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The absolute refractive index of a mediu...

The absolute refractive index of a medium is 2.0. The speed of light in vacuum/air is `3 xx 10^(8) m s^(-1)`. Find the speed of light in the medium.

Text Solution

Verified by Experts

Absolute refractive index of medium is,
`n= (c )/(v) `
` therefore v= (c )/(n) `
` = (3 xx 10^(8))/(2) `
` = 1.5 xx 10^(8) ms^(-1) `
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(a) The refractive index of glass is 1.5. What is the speed of light in glass? ("Speed of light in vacuum is "3.0 xx 10^(8) m s^(-1)) (b) Is the speed of light in glass independent of the colour of light? If not, which of the two colours red and violet travels slower in a glass prism?

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Knowledge Check

  • Refractive index of diamond is 2. Speed of ligh in it is ...... Cm // s.

    A
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    B
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  • Refraction index of medium-2 with respect to medium-1 is ...... .

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    C
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