ICSE Class 9 Light Important Question New Pattern

ICSE Class 9 Light Important Question New Pattern 2022

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ICSE Class 9 Light Important Question Table

Question 1 - What is a spherical mirror?

Question 2 - Name the two kinds of spherical mirrors and distinguish between them. 

Question 3 - Define the terms pole, principal axis and centre of curvature with reference to a spherical mirror. 

Question 4 - Name the spherical mirror which (i) diverges (ii) converges the beam of light incident on it. Justify your answer by drawing a ray diagram in each case. 

Question 5 - Define the terms focus and focal length of a concave mirror. Draw diagram to illustrate your answer. 

Question 6 - State the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain your answer with the help of suitable ray diagrams. 

Question 7 - The diagram below in Fig., shows a convex mirror. C is its centre of curvature and F is its focus. (i) Draw two rays from A and hence locate the position of image of object OA. Label the image IB. (ii) State three characteristics of the image.

Question 8 - Discuss the position and nature of image formed by a concave mirror when an object is moved from infinity towards the pole of mirror. 

Question 9 - How is the focal length of a spherical mirror related to its radius of curvature?

Question 10 - Write the spherical mirror's formula and explain the meaning of each symbol used in it.