Complete the following statement. The index of refraction compares the speed of light in a certain medium with the speed of light in:

vacuum

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air

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glass

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a prism

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water

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Solution

The correct option is A vacuum
The index of refraction is the ratio of speed of light in vacuum to that in the given medium for which the index is calculated.
$μ = \frac{c}{v}$
where $c$ is the speed of light in vacuum,
and $v$ is the speed of light in the medium.

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Question 23
How is the refractive index of a medium related to the speed of light? Obtain an expression for the refractive index of a medium with respect to another in terms of speed of light in these two media?

n = \frac{v}{c}

, where n denotes the refractive index of a medium, v the speed of light in the medium and c the speed of light in vacuum. The above statement 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

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Complete the following statement. The index of refraction compares the speed of light in a certain medium with the speed of light in:

The correct option is A vacuumThe index of refraction is the ratio of speed of light in vacuum to that in the given medium for which the index is calculated. μ=cvwhere c is the speed of light in vacuum,and v is the speed of light in the medium.

The correct option is A vacuum
The index of refraction is the ratio of speed of light in vacuum to that in the given medium for which the index is calculated.
$μ = \frac{c}{v}$
where $c$ is the speed of light in vacuum,
and $v$ is the speed of light in the medium.