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

Draw a ray diagram to show the refraction of a monochromatic ray through a prism when it suffers minimum deviation

A ray of light travels from water to air as shown in the diagram given below :

1) Copy the diagram and complete the path of the way. Given the critical angle for water is 48°.

2) State the condition so that internal reflection occurs in the above diagram.

The diagram below shows a point source P inside a water container. Four rays A, B, C, D starting from the source P are shown up to the water surface

1) Show in the diagram the path of these rays after striking the water surface.

The Critical Angle for the water-air surface is 48°.

2) Name the phenomenon which the rays B and D exhibit.

A boy uses the blue colour of light to find the refractive index of glass. He then repeats the experiment using the red colour of light. Will the refractive index be the same or different in the two cases? Give a reason to support your answer.

Copy the diagram given below and complete the path of the light ray till it emerges out of the prism. The critical angle of glass is 42°. In your diagram mark the angles wherever necessary.

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 o 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.