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# The speed of light depends:$A.$ Elasticity of the medium only$B.$ On inertia of the medium only$C.$ On elasticity as well as inertia.$D.$ Neither on elasticity nor on inertia

Last updated date: 22nd Jun 2024
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Hint: We know that the speed of light in the medium depends only on the refractive index of the medium. We will use the concept of absolute refractive index of the medium. Absolute refractive index of any medium is defined as the ratio of speed of light in vacuum or air to that of the medium.
Formula Used:
We are going to use the following given formula in order to solve the problem:-
$\mu =\dfrac{c}{v}$ .

$\mu =\dfrac{c}{v}$, where $\mu$ is the absolute refractive index, $c$ is the speed of light in vacuum and $v$ is the speed of light in the medium. The medium which has a lower value of refractive index has greater speed of light. A medium with relatively more speed of light is more elastic and the medium with relatively less speed of light is less elastic in nature. Therefore, we can see that the speed of light depends only on the elasticity of the medium.
Hence, option $(A)$ is correct.