A ray of white light falls on a prism. Draw a ray diagram to show that the prism disperses the white light.

Important Questions on Light Energy

EASY

8th ICSE

IMPORTANT

Concise Physics Middle School for Class 8>Chapter 5 - Light Energy>TEST YOURSELF>Q B

You are given a disc divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its colour when it is rotated rapidly?

EASY

8th ICSE

IMPORTANT

Concise Physics Middle School for Class 8>Chapter 5 - Light Energy>TEST YOURSELF>Q B

State the two laws of reflection of light.

EASY

8th ICSE

IMPORTANT

Concise Physics Middle School for Class 8>Chapter 5 - Light Energy>TEST YOURSELF>Q B

What is a spherical mirror?

MEDIUM

8th ICSE

IMPORTANT

Concise Physics Middle School for Class 8>Chapter 5 - Light Energy>TEST YOURSELF>Q B

State the two kinds of spherical mirror and distinguish them with the aid of proper diagrams.

EASY

8th ICSE

IMPORTANT

Concise Physics Middle School for Class 8>Chapter 5 - Light Energy>TEST YOURSELF>Q B

Explain the following terms:
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.

EASY

8th ICSE

IMPORTANT

Concise Physics Middle School for Class 8>Chapter 5 - Light Energy>TEST YOURSELF>Q B

What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.

EASY

8th ICSE

IMPORTANT

Concise Physics Middle School for Class 8>Chapter 5 - Light Energy>TEST YOURSELF>Q B

Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by a concave mirror.

EASY

8th ICSE

IMPORTANT

Concise Physics Middle School for Class 8>Chapter 5 - Light Energy>TEST YOURSELF>Q B

Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by a convex mirror.