Optically Rarer Medium and Optically Denser Medium

Author:Lakhmir Singh & Manjit Kaur
10th CBSE
IMPORTANT

Optically Rarer Medium and Optically Denser Medium: Overview

In this topic, we will get to know about optically rarer and denser medium. Then it discusses the refraction of light when it goes from a rarer medium to denser medium and vice versa in detail with suitable diagrams.

Important Questions on Optically Rarer Medium and Optically Denser Medium

MEDIUM
IMPORTANT

The refractive index of glass with respect to air is 32 and the refractive index of water with respect to air is 43. The refractive index of glass with respect to water will be:

EASY
IMPORTANT

The refractive index of water with respect to air is 43. The refractive index of air with respect to water will be:

MEDIUM
IMPORTANT

The refractive indices of four media A, B, C and D are 1.44, 1.52, 1.65 and 1.36 respectively. When light travelling in air is incident in these media at equal angle, the angle of refraction will be the minimum:

EASY
IMPORTANT

The refractive index of glass with respect to air is 32. The refractive index of air with respect to glass will be:

EASY
IMPORTANT

Refractive indices of carbon disulphide and ethyl alcohol are 1.63 and 1.36 respectively. Which is optically denser?

MEDIUM
IMPORTANT

Which of the following diagrams shows the ray of light refracted correctly?

EASY
IMPORTANT

Light travels more quickly through water than through glass.

If a ray of light passes from glass into water, how will it bend: towards the normal or away from the normal?

EASY
IMPORTANT

Light travels more quickly through water than through glass.

Which is optically denser: water or glass?

EASY
IMPORTANT

Draw a labelled ray diagram to show how a ray of light is refracted when it passes:

from an optically denser medium into air.

EASY
IMPORTANT

Draw a labelled ray diagram to show how a ray of light is refracted when it passes:

from air into an optically denser medium. 

EASY
IMPORTANT

In which material do you think light rays travel faster-glass or air?

EASY
IMPORTANT

As light rays pass from water into glass, are they refracted towards the normal or away from the normal?

EASY
IMPORTANT

When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?

EASY
IMPORTANT

A ray of light goes from water into air. Will it bend towards the normal or away from the normal?

EASY
IMPORTANT

A ray of light travelling in air enters obliquely into water. Does the ray of light bend towards the normal or away from the normal? Why?

EASY
IMPORTANT

A ray of light travelling in glass emerges into air. State whether it will bend towards the normal or away from the normal.