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Define absolute refractive index....

Define absolute refractive index.

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The ratio of the speed of light in air or vacuum to the speed of light in any medium is called the absolute refractive index.
If 'c' is the speed of light in air and v is the speed of light in the medium, then the refractive index of the medium is given by
`"Refractive Index"(eta_(m))=("Speed of light in air")/("Speed of light in the medium")=(c)/(v)`
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Knowledge Check

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    A
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    B
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    D
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    B
    diamond
    C
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    D
    ruby

  • Arrange following in increasing order of their absolute refractive index

    A
    water , kerosene , glass , diamond
    B
    kerosne , water , glass , diamond
    C
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    D
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