Question

The refractive index of glass with respect to water is 1.125. If the speed of light in water
is 2.25 x 108 m/s, then calculate the speed of light in glass.
​

Answer 1

Answer:

see the attachment

Explanation:

Answer 2

Answer:

The refractive index of glass with respect to water is 1.125. If the speed of light in water  is $2.25*10^{8}m/s$, then the speed of light in glass is $2.25*10^{8}m/s$

​ Explanation:

When a light ray travels from one medium to another medium its direction changes because light velocity is different for a different medium

the refractive index is the degree of change in direction of light

it can be expressed as the ratio of the velocity of light in a different medium

here the media are water and glass

$n=v_{g}/v_{w}$

where $v_{g}$-velocity of light in the glass

$v_{w}$-velocity of light in the water

the refractive index of glass with respect to water is $1.12$

the speed of light in water is $2.25*10^{8}m/s$

substitute the given values we get

the speed of light in glass is

$v_{g}=nv_{w}$

$=1.12*2.25*10^{8}=2.25*10^{8}m/s$