If c is the speed of light in vacuum and v is the speed of light in the given medium, the absolute refractive index(n) of a medium is given as .

n = c \times v

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n = \frac{c}{v}

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n = \frac{v}{c}

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v = c \times n

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Solution

The correct option is B $n = \frac{c}{v}$
The absolute refractive index is defined as a ratio of the speed of light in vacuum to the speed of light in a given medium.
It is calculated as $n = \frac{c}{v}$ where, c is the speed of light in vacuum and v is the speed of light in the given medium.

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Similar questions

Q. If absolute refractive index of a medium is 1.5, what is the speed of light in that medium?

Q. If

V_{c}

is the speed of light in vacuum and

V_{m}

the speed of light in a given medium, the refractive index of the medium is :

State the laws of refraction of light. If the speed of light in vacuum is $3 \times 10^{8} m s^{- 1}$ , find the speed of light in a medium of absolute refractive index 1.5

Q. If

v_{1}, v_{2}

and c represent the speed of light in medium 1, medium 2, and vacuum respectively , write the expressions for
(a) absolute refractive index of medium 1
(b) absolute refractive index of medium 2
Hence show that

_{1} n_{2} = \frac{n_{2}}{n_{1}}

Q. (a) State the laws of refraction of light. Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum.
(b) The absolute refractive indices of two media 'A' and 'B' are 2.0 and 1.5 respectively. If the speed of light in medium 'B' is

2 \times 10^{8}

m/s, calculate the speed of light in:
(i) vacuum,
(ii) medium 'A'.

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If c is the speed of light in vacuum and v is the speed of light in the given medium, the absolute refractive index(n) of a medium is given as .

The correct option is B n=cvThe absolute refractive index is defined as a ratio of the speed of light in vacuum to the speed of light in a given medium. It is calculated as n=cv where, c is the speed of light in vacuum and v is the speed of light in the given medium.

The correct option is B $n = \frac{c}{v}$
The absolute refractive index is defined as a ratio of the speed of light in vacuum to the speed of light in a given medium.
It is calculated as $n = \frac{c}{v}$ where, c is the speed of light in vacuum and v is the speed of light in the given medium.