English Medium कक्षा १० - CBSE Question Bank Solutions for Science

In the following diagram the correctly marked angles are : 

(a) ∠A and ∠e

(b) ∠i, ∠A and ∠D

(c) ∠A ∠r and ∠e

(b) ∠A ∠r and ∠D

Study the following ray diagram:

In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by

(A) y, p, z

(B) x, q, z

(C) p, y, z

(D) p, z, y

Define the term dispersion of white light.

Draw a ray diagram to show the dispersion of white light.

State the cause of dispersion of white light

Explain the term “corrosion” with an example. Write a chemical equation to show the process of corrosion of iron.

What special name is given to the corrosion of iron?

What type of chemical reaction is involved in the corrosion of iron?

Name any three objects (or structures) which are gradually damaged by the corrosion of iron and steel.

The chemical reaction involved in the corrosion of iron metal is that of ______.

1. A ray of white light breaks up into its components while passing through a glass prism. Draw a ray diagram to show the path of rays.
2. Mark the least deviated colour in your diagram.
3. Why do different coloured rays deviate differently in a prism?

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

As light rays emerge from a glass prism into air, are they refracted towards or away from the normal?

In the formation of spectrum of white light by a prism:

1. which colour is deviated least?
2. which colour is deviated most?

In the formation of spectrum of white light by a prism:

 which colour is deviated most?

When a ray of light enters a prism, it bends ______ the normal; as it leaves the prism, it bends ______ the normal.

 What happens when a ray of ordinary light is passed through a triangular glass prism?

 What will happen if another similar glass prism is placed upside down behind the first prism?

When a beam of white light is passed through a prism, it splits to form lights of seven colours. Is it possible to recombine the lights of seven colours to obtain the white light again? Explain your answer.

What is spectrum?