Question

The absolute refractive index of glass is 1.5 . If velocity of light in water is given by 2.8×10^8 m/s. find the refractive index of water with respect to glass.​

Answer 1

Answer:

Given,

Refractive index of glass = 1.5

That means,

$\frac{c}{v} = 1.5$

c = 3 × $10^{8}$

So,

$\frac{3 * 10^{8} }{1.5} = v\\v = 2 * 10^{8}$

Velocity of light is glass is 2 × $10^{8}$

Now,

Refractive index of water with respect to glass = $\frac{v_{w} }{v_{g}}$

$\frac{2.8*10^{8} }{2*10^{8} }$

= 1.4