(English Medium) ICSE Class 10 - CISCE Important Questions for Physics

State the dependence of angle of deviation on the refractive index of the material of the prism.

State the dependence of angle of deviation on the wavelength of light

Write a relationship between the angle of incidence and angle of refractions for a given pair of media.

Name one factor that affects the lateral displacement of light as it passes through a rectangular glass slab.

The speed of light in glass is 2 × 10⁵ km/s. What is the refractive index of glass?

Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state.

1. What change is observed in the appearance of the pencil?
2. Name the phenomenon responsible for the change.
3. Draw a ray diagram showing how the eye sees the pencil.

Draw the diagram given below and clearly show the path taken by the emergent ray.

A ray of light passes from water to air. How does the speed of light change?

Which colour of light travels fastest in any medium except air?

Name the factors affecting the critical angle for the pair of media.

Name a prism required for obtaining a spectrum of Ultraviolet light.

Light passes through a rectangular glass slab and through a triangular glass prism. In what way does the direction of the two emergent beams differ and why?

Why is the ratio of the velocities of light of wavelengths 4000Å and 8000Å in vacuum 1: 1?

Which of the above wavelengths has a higher frequency?

State the relation between the critical angle and the absolute refractive index of a medium.

Which colour of light has a higher critical angle? Red light or green light.

The following diagram shows a 60°, 30°, 90° glass prism of critical angle 42°, Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on each surface.

A ray of light XY passes through a right-angled isosceles prism as shown below

1. What is the angle through which the incident ray deviates and emerges out of the prism?
2. Name the instrument where this action of the prism is put into use.
3. Which prism surface will behave as a mirror?

Draw the diagram of a right-angled isosceles prism which is used to make an invented image erect.

How does the angle of deviation produced by a prism change with increase in the angle of incidence. Draw a curve showing the variation in the angle of deviation with the angle of incidence at a prism surface.