Question

Light enters from air to liquid medium of refractive index 1.44 what is the speed of light in liquid

Answer 1

The speed of light in a medium of refractive index $\mu$ is $\frac{c}{\mu}$, where $c$ speed of light in air.

So, the speed of light in liquid having refractive index 1.44 is

$\frac{3*10^8}{1.44} =2.08*10^8\;m/s$

Answer 2

Given that,

The refractive index of medium is 1.44

To find,

The speed of light in liquid.

Solution,

The ratio of the speed of light in vacuum to the speed of light in medium is called the refractive index of the medium such that,

$n=\dfrac{c}{v}\\\\v=\dfrac{c}{n}\\\\v=\dfrac{3\times 10^8}{1.44}\\\\v=2.08\times 10^8\ m/s$

So, the speed of light in the liquid is $2.08\times 10^8\ m/s$.

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Refractive index

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