Question

The speed of light in transparent medium is 2.35 *10^8 m/s. Find the refractive index of the medium.​

Answer 1

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Let us round off the value in order to make calculation easy !!

So, $2.35$×$10^8 m/s$ = $2.4$×$10^8 m/s$

Now,

Absolute refractive index=speed of light in medium/speed of light in air or vacuum.

= $\frac{2.4×10^8}{3×10^8}$

= 0.8

So, The refractive index of the medium is 0.8

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☆Hope it helps !!!