Question

calculate the refractive index of glass if the speed of light in glass is
$2 \times 10 ^{8}$
m/s
​

Answer 1

Not much information given.

Correct Question:-

The speed of light in water and glass is 2.2×10⁸ m/s and 2×10⁸ m/s ,respectively. What is the refractive index of glass w.r.t water?

Answer → 1

Explanation:

In this case, the refractive index of glass with respect to water is given as:

$\large\sf { n = \frac {v_{1}}{v_{2}}}$

where, the speed of light in water medium, $\large\sf { v_{1} = 2.2 × 10⁸ m/s }$ and the the speed of light in glass medium $\large\sf { v_{2} = 2 × 10⁸ m/s}$ .

Therefore, $\large\boxed{\sf { n = \frac {2.2 × 10⁸}{2×10⁸} = 1.1 }}$

Hence, the refractive index of the transparent medium is 1.1