# Class 7 Science Light Important Notes

Last updated on August 30th, 2023 at 12:57 am

## Class 7 Chapter Light Important Notes

Get detailed notes on Class 7 Chapter Light from experienced tutors. Our notes cover all important topics and provide a comprehensive overview of the chapter.

Multiple Choice Questions

Which of the following is a form of energy that enables us to see things around us?

1. a) Sound
2. b) Heat
3. c) Light
4. d) Electricity

When light strikes a smooth, polished surface, it gets reflected at which angle?

1. a) A random angle
2. b) 90 degrees
3. c) The same angle as the incident ray
4. d) None of the above

Answer: c) The same angle as the incident ray

What is the angle between the incident ray and the normal called?

1. a) Angle of incidence
2. b) Angle of reflection
3. c) Angle of deviation
4. d) None of the above

Answer: a) Angle of incidence

Which type of mirror always forms virtual images that are smaller than the object?

1. a) Concave mirror
2. b) Convex mirror
3. c) Plane mirror
4. d) None of the above

Answer: b) Convex mirror

State True or False .

Match the following with their descriptions:

 Column A Column B Concave mirror Curves outward like the back of a spoon Convex mirror Curves inward like a bowl Reflection Bending of light when it passes through a medium Refraction Process by which light bounces back from a surface Prism Triangular piece of glass that can split white light into its different colors Angle of incidence The fastest known speed in the universe Speed of light The angle between the incident ray and the normal Retina Innermost layer of the eye that contains photoreceptor cells

Concave mirror – Curves inward like a bowl

Convex mirror – Curves outward like the back of a spoon

Reflection – Process by which light bounces back from a surface

Refraction – Bending of light when it passes through a medium

Prism – Triangular piece of glass that can split white light into its different colors

Angle of incidence – The angle between the incident ray and the normal

Speed of light – The fastest known speed in the universe

Retina – Innermost layer of the eye that contains photoreceptor cells

Definitions:-

Define Light.

Light is a form of energy that enables us to see things around us.

Define Reflection.

Reflection is the process by which light bounces back from a surface it cannot pass through.

Define Refraction.

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