NCERT Solutions for Class 7 Science Chapter 11 Light

Edited By Vishal kumar | Updated on Apr 21, 2025 02:58 PM IST

Chapter 11 of class 7 science Light help us how mirrors and lenses are used in our daily life. You will see how concave mirrors form a larger image (like in a shaving mirror) and how convex mirrors provide a broader view (like in car side mirrors). It also demonstrates how light makes us see, how shadows are formed, and how images are formed. All of it is done in an easy and enjoyable manner!

The NCERT Solutions for Class 7 Science Chapter 11 Light are helpful in understanding crucial concepts such as reflection, mirrors, and how we see objects. Attempt the questions yourself initially, and then refer to these solutions if you get stuck. They're an excellent resource to study well and score higher in your examinations.

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Download the PDF of NCERT Solutions for Class 7 Science Chapter 11 Light
NCERT Solutions For Class 7 Science Chapter 11 Light: Exercise Solutions
Approach to Solve Questions of Light Class 7
Important Concepts of NCERT Class 7 Science Chapter 11:
Light Class 7 Science Chapter 11-Topics
Importance of Class 7 Science Chapter 11 Light
NCERT Solutions for Class 7 Science Chapter-Wise

NCERT Solutions for Class 7 Science Chapter 11 Light

Download the PDF of NCERT Solutions for Class 7 Science Chapter 11 Light

You can easily download the NCERT Solutions for Class 7 Science Chapter 11 Light as a PDF and use it anytime for quick and simple revision.

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NCERT Solutions For Class 7 Science Chapter 11 Light: Exercise Solutions

1. Fill in the blanks:
(a) An image that cannot be obtained on a screen is called____________.
(b) Image formed by a convex __________ is always virtual and smaller in size.
(c) An image formed by a __________ mirror is always of the same size as that of the object.
(d) An image which can be obtained on a screen is called a _________ image.
(e) An image formed by a concave ___________ cannot be obtained on a screen.

Answer:

(a) virtual image. Only real images can be obtained on the screen.

(b) mirror.

(d) real image. On these type of images can be obtained on the screen.

(e) concave lens. As virtual images cannot be obtained on the screen.

2. Mark ‘T’ if the statement is true and ‘F’ if it is false:
(a) We can obtain an enlarged and erect image by a convex mirror. (T/F)
(b) A concave lens always form a virtual image. (T/F)
(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T/F)
(d) A real image cannot be obtained on a screen. (T/F)
(e) A concave mirror always form a real image. (T/F )

Answer:

(a) False. As the size of the image formed is smaller.

(b) True.

(d) False. Real images can be obtained on screens whereas virtual images cannot be.

(e) False. As the nature of the image is decided by the distance between the object and mirror.

3. Match the items given in Column I with one or more items of Column II.

Column I	Column II
(a) A plane mirror	(i) Used as a magnifying glass.
(b) A convex mirror	(ii) Can form an image of objects spread over a large area.
(c) A convex lens	(iii) Used by dentists to see an enlarged image of teeth.
(d) A concave mirror	(iv) The image is always inverted and magnified.
(e) A concave lens	(v) The image is erect and of the same size as the object.
	(vi) The image is erect and smaller in size than the object.

Answer:

(a) The image formed by a plane mirror is erect and of the same size.

(b) The image formed by a concave mirror is inverted and magnified. Also, they can form images of objects spread over a large area.

(d) A concave mirror is used to see enlarged images.

(e) The image formed by a concave lens is erect and smaller in size.

4 . State the characteristics of the image formed by a plane mirror.

Answer:

An image formed by a plane mirror is:-

(i) virtual

(ii) erect

(iii) of the same size

5 . Find out the letters of the English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.

Answer:

The letter which has vertical symmetry will have this property.

In English alphabets, we have A, H, I, M, O, T, U, W, X, X, Y that appears exactly like itself in the plane mirror.

6. What is a virtual image? Give one situation where a virtual image is formed.

Answer:

The image which can be screened (or obtained on screen) is known as a virtual image.

For e.g. in case of a candle which is placed in front of a plane mirror, we observe a virtual image of the candle formed behind the mirror.

7 . State two differences between a convex and a concave lens.

Answer:

The basic difference between the two are given below:-

(i) In the case of a convex lens, it converges the falling rays of light, whereas in the case of the concave lens, the rays diverge.

(ii) A concave lens has thick edges and is thin at the middle, but the convex lens is thick at the middle.

8. Give one use each of a concave and a convex mirror.

Answer:

The side-view mirror in a vehicle is a convex mirror for getting a wider view of the rear.

To see an enlarged image of teeth, dentists use a concave mirror.

9. Which type of mirror can form a real image?

Answer:

A concave mirror can form real images which can be obtained on the screen. The nature of the image formed by these mirrors depends upon the distance between the object and the mirror.

10 . Which type of lens always forms a virtual image?

Answer:

The images formed by a concave lens is always virtual, magnified and erect in nature.

11 . A virtual image larger than the object can be produced by a
(i) concave lens (ii) concave mirror
(iii) convex mirror (iv) plane mirror

Answer :

The correct answer is a concave mirror. The image formed by a concave mirror can be both virtual or real, depending on the position of the object. Also, the image obtained is magnified.

12 . David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be
(i) 3 m (ii) 5 m (iii) 6 m (iv) 8 m

Answer:

We are given the distance between the mirror and his image = 4 m

Now, if David moves 1 m towards the mirror, then the distance is = 4 − 1 = 3 m

Hence, the distance between David and his image is = 3 + 3 = 6 m.

13 . The rearview mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s. The driver sees in his rear view mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be
(i) 1 m/s (ii) 2 m/s (iii) 4 m/s (iv) 8 m/s

Answer:

We are given that the speed of the car is 2 m/s, which implies that the car is approaching the truck with a speed of 2 m/s.

Hence, the speed at which the image of the truck appears to approach the driver will be: 2 $\times$ 2 = 4 m/s

Approach to Solve Questions of Light Class 7

What is Light?
Light is a form of energy that helps us see the beautiful world.

Know the Important Terms

Reflection: Bouncing back of light from a reflecting surface.

Mirror: A smooth surface that reflects most of the light.

Lateral Inversion: Left and right appear reversed in a mirror image.

Regular and Diffused Reflection: Smooth surfaces cause regular reflection; rough ones cause diffused reflection.

Use the Right Basics
Light always travels in a straight line.
Angle of incidence = Angle of reflection (Law of Reflection).

Understand Concepts with Ray Diagrams
Learn to draw neat ray diagrams to explain reflection and image formation by lens and mirror .

Practice Numerical and Conceptual Questions
Solve examples from NCERT Solutions for Class 7 Science Chapter 11 Light.

Important Concepts of NCERT Class 7 Science Chapter 11:

1. Light Travels in a Straight Line:

Light always moves in straight paths. This is why shadows form in straight lines and pinhole cameras work.
2. Reflection of Light:

When light hits a shiny or smooth surface, it bounces back.

Angle of Incidence $=$ Angle of Reflection

3. Plane Mirrors:

They form images that are virtual, upright, and the same size as the object.
Left appears right and right appears left (lateral inversion).

4. Concave Mirrors (curved inward like a cave):

Can form real or virtual images depending on the object's distance.
Used in torches, shaving mirrors, and headlights.

5. Convex Mirrors (curved outward):

Always form virtual, erect, and smaller images.
Used in the rear-view mirrors of vehicles.

6. Lenses:

Convex lens: Thicker at the center; can form real or virtual images. Used in magnifying glasses.
Concave lens: Thinner at the center; always forms virtual, erect, and smaller images.

7. Sunlight - White or Coloured?

Sunlight is made up of seven colours (VIBGYOR).
This is seen in a rainbow or when passed through a prism.

Light Class 7 Science Chapter 11-Topics

Light Travels Along a Straight Line
Reflection of Light
Right or Left!
Playing With Spherical Mirrors
Images Formed by Lenses
Sunlight — White or Coloured?

Importance of Class 7 Science Chapter 11 Light

NCERT Solutions for class 7 science chapter 11 Light are a great help for students. this help the students to solve homework and understand the chapter better. These solutions cover all the important questions and concepts from the chapter. Since many of these topics come again in higher classes, studying them well now makes future learning easier too.

NCERT Solutions for Class 7 Science Chapter-Wise

The chapterwise solutions are given below:

NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants

NCERT Solutions for Class 7 Science Chapter 2 Nutrition in Animals

NCERT Solutions for Class 7 Science Chapter 3 Heat

NCERT Solutions for Class 7 Science Chapter 4 Acids, Bases and Salts

NCERT Solutions for Class 7 Science Chapter 5 Physical and Chemical Changes

NCERT Solutions for Class 7 Science Chapter 6 Respiration in Organisms

NCERT Solutions for Class 7 Science Chapter 7 Transportation in Animals and Plants

NCERT Solutions for Class 7 Science Chapter 8 Reproduction in Plants

NCERT Solutions for Class 7 Science Chapter 9 Motion and Time

NCERT Solutions for Class 7 Science Chapter 10 Electric Current and Its Effects

NCERT Solutions for Class 7 Science Chapter 11 Light

NCERT Solutions for Class 7 Science Chapter 12 Forests: Our Lifeline

NCERT Solutions for Class 7 Science Chapter 13 Wastewater Story

NCERT Solutions for Class 7 Subject Wise

NCERT Solutions for Class 7 Maths

NCERT Solutions for Class 7 Science

Also Check NCERT Books and NCERT Syllabus here

Frequently Asked Questions (FAQs)

1. Whether the Class 7 Science Chapter 15 Light is useful in higher studies ?

Yes, this chapter is very important for higher studies in the field of science and physics. Also, we will study in Class 10 Science NCERT syllabus and Class 12 Physics NCERT book.

2. What is light?

Light is a form of energy that is detected by the human eye. It is an electromagnetic wave.

3. Write the name natural source of light.

The natural sources of light are; lightning, stars, the sun, etc

4. What are the topics covered in NCERT Class Science chapter 15?

Here are the topics covered in NCERT Class 7 Science chapter 15

Light Travels Along a Straight Line
Reflection of Light
Right or Left!
Playing With Spherical Mirrors
Images Formed by Lenses
Sunlight — White or Coloured?

Also Read

NCERT Solutions for Class 7 Science Chapter 13 Wastewater Story

NCERT Solutions for Class 7 Science Chapter 4 Acids Bases and Salts

NCERT Solutions for Class 7 Science Chapter 5 Physical and Chemical Changes

NCERT Solutions for Class 7 Maths - Download Chapterwise PDF Solution

NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities

NCERT Solutions for Class 7 Science Chapter 12 Forests Our Lifeline

NCERT Books for Class 7 English 2025-26: Download PDF

NCERT Books for Class 7 Social Science 2025-26: Download PDF here

NCERT Books for Class 7 Science 2025-26: Download PDF Here

NCERT Books for Class 7 All Subjects: Download PDF

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Option 1) decrease twice	Option 2) increase two fold
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