Question

How is the direction of light changed when it travels from an optically denser medium to an optically rarer medium????? please answer it fast......​

Answer 1

The light bends away from the normal

Step-by-step explanation:

We can solve the problem by using Snell's law:

`n_1 sin \theta_1 = n_2 sin \theta_2`

where:

`n_1` is the index of refraction of the first medium

`n_2` is the index of refraction of the second medium

`\theta_1` is the angle of incidence (angle between the incoming ray and the normal to the interface)

`\theta_2` is the angle of refraction (angle between the outcoming ray and the normal to the interface)

We can rearrange the equation as

`sin \theta_2 = (n_1)/(n_2)sin \theta_1`

In this problem, light travels from an optically denser medium to an optically rarer medium, so

`n_1 > n_2`

Therefore, the term
`(n_1)/(n_2)` is greater than 1, so

`sin \theta_2 > sin \theta_1\\\rightarrow \theta_2 > \theta_1`

which means that the angle of refraction is greater than the angle of incidence, and so the light will bend away from the normal.