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?
- a) Sound
- b) Heat
- c) Light
- d) Electricity
Answer: c) Light
When light strikes a smooth, polished surface, it gets reflected at which angle?
- a) A random angle
- b) 90 degrees
- c) The same angle as the incident ray
- 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?
- a) Angle of incidence
- b) Angle of reflection
- c) Angle of deviation
- d) None of the above
Answer: a) Angle of incidence
Which type of mirror always forms virtual images that are smaller than the object?
- a) Concave mirror
- b) Convex mirror
- c) Plane mirror
- 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 |
Answers
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.
