Question

light enters from air to glass having refractive index 1.2 then find the speed of light in glass the speed of light in vacuum is 3 * 10^8 metre second​

Answer 1

• refractive index of air is ni
• refractive index of glass is nr
• velocity of incidence angle in air is vi
• velocity of refracted angle in glass is very

your answer is 2.5×10^8

Answer 2

The speed of light in glass is $v=2.5\times 10^8\ m/s$

Explanation:

Given that,

The refractive index of the glass, n = 1.2

To find,

The speed of light in glass.

Solution,

The ratio of speed of light in air to the speed of light in glass is called refractive index of that material. It is given by :

$n=\dfrac{c}{v}$

$v=\dfrac{c}{n}$

$v=\dfrac{3\times 10^8}{1.2}$

$v=2.5\times 10^8\ m/s$

So, the speed of light in glass is $v=2.5\times 10^8\ m/s$.

Learn more,

Refractive index

https://brainly.in/question/6293934