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NCERT Solutions for Class 7 Science Chapter 11 - Light

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Last updated date: 24th Jul 2024
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NCERT Class 7 Science Chapter 11 Light Question and Answer - FREE PDF Download

NCERT Solutions for Class 7 Science Chapter 11 Light delves into the fascinating world of light and its properties. This chapter is crucial for building a strong foundation in understanding how light behaves and interacts with different materials. In Class 7 Science Chapter Light Question Answer, you'll explore concepts such as the nature of light, reflection, refraction, and the formation of images by different types of mirrors and lenses.

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Table of Content
1. NCERT Class 7 Science Chapter 11 Light Question and Answer - FREE PDF Download
2. Quick Insights for NCERT Solutions for Class 7 Science Chapter Light Question Answer
3. Access NCERT Solutions for Class 7 Science Chapter 11 – Light
    3.11. Fill in the blanks: 
    3.2Choose the Correct Option in Questions 11-13.
4. NCERT Class 7 Science Chapter 11 Light - Quick Overview of Detailed Structure of Topics
5. Important Points Covered in Class 7 Science Light
6. Benefits of Vedantu’s NCERT Science Light Class 7 Questions and Answers
7. Related Study Materials for Class 7 Science Chapter Light
8. NCERT Solutions for Class 7 Science - Chapter-wise Link for FREE PDF
9. Additional Study Materials for Class 7 Science
FAQs


Vedantu’s Class 7 Science Chapter 11 Question Answer provides comprehensive solutions for all the questions in this chapter, ensuring a thorough understanding of the subject. With detailed explanations and step-by-step answers, the Light Chapter of Class 7 PDF makes learning engaging and effective.


Download our NCERT Solutions for Class 7 Science Chapter Light, revised based on the Class 7 Science syllabus. Get started with Vedantu’s NCERT Solutions for Chapter 11 to embark on a journey of academic excellence. 


Quick Insights for NCERT Solutions for Class 7 Science Chapter Light Question Answer

  • Light Class 7 Questions And Answers offers a comprehensive understanding of the properties and behaviour of light. 

  • Class 7 Science Light delves into concepts such as reflection, refraction, and the formation of shadows. Students can grasp the fundamentals of how light interacts with various objects and surfaces through detailed explanations and illustrative examples. 

  • Light Question Answer Class 7 explores phenomena like dispersion and the formation of rainbows, providing a fascinating insight into the science behind these natural occurrences. 

  • With the help of the Light Chapter of Class 7 PDF, students can strengthen their understanding of light and its role in the world around us.

  • Class 7 Science Chapter 11 Question Answer discusses the principles of optics and their applications in daily life. By studying this chapter, students can comprehend the behaviour of light rays and how they are utilised in devices like mirrors and lenses. 

  • Light Question Answer Class 7 will help to develop proficiency in solving numerical problems related to light and its properties, enhancing problem-solving skills.

  • Vedantu provides supplementary resources such as revision notes, practice questions, and interactive quizzes to enhance the learning experience for students.

Access NCERT Solutions for Class 7 Science Chapter 11 – Light

1. Fill in the blanks: 

a. An image that cannot be obtained on a screen is called ----------.

Ans: Virtual image.

 

b. The image formed by a concave ---------- is always virtual and smaller in size.

Ans: Mirror.

 

c. An image formed by a ------------- mirror is always of the same size as that of the object.

Ans: Plane.

 

d. An image that can be obtained on a screen is called a --------- image.

Ans: Real.

 

e. An image formed by a concave ---------------- cannot be obtained on a screen.

Ans: Lens.

 

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.

Ans: F.

 

The convex mirror forms an erect and diminished image.

 

b. A concave lens always forms a real image.

Ans: F

 

Concave lenses form virtual, erect and diminished images.

 

c. We can obtain a real, enlarged and inverted image by a concave mirror.

Ans: T

 

d. A real image cannot be obtained on the screen. 

Ans: F

 

It is a virtual image that cannot be obtained on the screen.

 

e. A concave mirror always forms a real image.

Ans: F

 

Concave mirrors can also form virtual images.

 

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

Column I

Column II

  1. A plane mirror

  1. A convex mirror

  1. A convex lens 

  1. A concave mirror 

  1. A concave lens 

  1. used as a magnifying glass.

  1. can form images of objects Spread over a large area. 

  2. used by dentists to see enlarged images of teeth. 

  3. the image is always inverted and magnified. 

  4. the image is erect and of the same size as the object. 

  5. the image is erect and smaller  

         in size than the object. 



 

Ans: The table showing the matched answers is,

Column I

Column II

  1. A plane mirror

v. the image is erect and of the same size as the object. 

  1. A convex mirror

ii. can form images of objects Spread over a large area.

  1. A convex lens

i. used as a magnifying glass.

  1. A concave mirror 

iii. used by dentists to see enlarged images of teeth. 

  1. A concave lens

iv. the image is always inverted and magnified. 

 

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

Ans: Characteristics of the image formed by a plane mirror are:

  1. The image distance is equal to object distance. 

  2. Image height is equal to object height. 

  3. The image is virtual and erect.

 

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.

Ans: A, H, O, T, U, V, W, X, Y are the letters in the English alphabet which form the same image as the letter is, as they are laterally symmetrical.

 

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

Ans: Virtual image: When light rays seem to originate at a spot but do not actually intersect, a virtual image is created. It is visible to human eyes. As a result, rear-view mirrors create virtual images.

 

The situations where a virtual image is formed:

  1. It is formed when reflected rays appear to meet.

  2. Such images cannot be obtained on the screen.

  3. Virtual images are always formed in the plane mirror and convex mirror.

 

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

Ans: The difference between convex and concave lens is shown below:

Convex lens

Concave lens

  1. The convex lens is thicker at the middle and thinner at the edges.

  2. They can form a real image.

  1. The concave lens is thinner in the middle, thicker at the edges.

  2. They can not form a real image.

 

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

Ans: Use of the concave and convex mirror: 

  1. Concave mirror – used as a reflector in a torch.

  2. Convex mirror – used in vehicles as a rear-view mirror. 

 

9. Which type of lens always forms a real image?

Ans: Neither concave nor convex lens always form a real image. A convex lens forms both real and virtual images. A concave lens forms virtual, erect and diminished images.

 

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

Ans: The type of lens which always forms a virtual image is:

  1. A concave lens always forms a virtual image. 

  2. After the rays are refracted, they never converge and so there will be no real image.

 

Choose the Correct Option in Questions 11-13.

11. A virtual image larger than the object can be produced by a

  • Concave lens 

  • Concave mirror 

  • Convex lens 

  • Plane mirror

Ans: (b) Concave mirror. 

 

A concave mirror forms a virtual image larger than the object.

 

12.David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. if he moves 1m towards the mirror, then the distance between David and his image will be 

  • 3 m 

  • 5 m 

  • 6 m 

  • 8 m

Ans: (c) 6 m. 

 

Plane Mirror
 


In the above image, 

The distance between the mirror and the object is equal to the distance between the mirror and the image.

 

The distance between mirror and David image is 4m

 

When he moves 1m towards the mirror, then the distance is reduced as,

 

Distance between the mirror and the object is 4-1=3m.

 

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

 

13. The rear-view 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 the car. The speed at which the image of the truck appears to approach the driver will be 

  • 1 m/s 

  • 2 m/s 

  • 4 m/s 

  • 8 m/s.

Ans: (c) 4 m/s.

 

In a plane mirror, the object and its image always remain at the same distance from the mirror. So, when the car reverses at a speed of 2m/s, then the image will also appear to move towards the driver.

 

Therefore, the speed at which the image of the truck appears to approach the driver will be 2+2=4m/s.


NCERT Class 7 Science Chapter 11 Light - Quick Overview of Detailed Structure of Topics

S.No.

Topics of Light Class 7

1

Light Travels Along A Straight Line 

2

Reflection of Light

3

Right or Left!

4

Playing With Spherical Mirrors

5

Images Formed by Lenses

6

Sunlight - White or Coloured?



Important Points Covered in Class 7 Science Light

  • Light is a form of energy that enables us to see objects when it gets reflected from them. Light can be detected through our eyes.

  • Light travels along a straight line.

  • There are two types of images i.e. real images and virtual images.

  • The process of changing the path of light through a mirror or shiny object is called the reflection of light.

  • There are two types of spherical mirrors i.e. convex mirrors and concave mirrors.

  • Lenses are defined as transparent pieces of glass. Lenses are bounded by two spherical surfaces.

  • When white light passes through a glass prism then white light gets split into seven colors. This phenomenon of splitting white light is called dispersion of light.


Benefits of Vedantu’s NCERT Science Light Class 7 Questions and Answers

  • Vedantu's NCERT Science Light Class 7 Questions And Answers provides comprehensive explanations and detailed answers to all questions, ensuring a solid grasp of the fundamental concepts of light.

  • Class 7 Science Light explores various aspects of light, including reflection, refraction, and dispersion, elucidating the principles through practical examples and illustrations.

  • Each solution is prepared by Vedantu’s Master Teachers to help students understand complex topics such as the formation of images by mirrors and lenses, the phenomenon of dispersion in prisms, and the functioning of the human eye.

  • With step-by-step explanations, Vedantu's Light Chapter of Class 7 PDF facilitates conceptual clarity and promotes problem-solving skills development among students.

  • By utilising Vedantu's Light Class 7 Questions And Answers, students can enhance their academic performance and develop confidence in solving questions related to the properties and behaviour of light.


Related Study Materials for Class 7 Science Chapter Light

For more insights, students can also download additional study materials provided by Vedantu for Chapter 11 of NCERT Science Class 7–


S.No

Study Material Links for Class 7 Science Light

1

Class 7 Light Important Questions

2

Class 7 Light Revision Notes



Conclusion

Vedantu’s NCERT Solutions for Class 7 Science Chapter 11 - Light offers a vital tool for students to understand light's principles. Focus on understanding the behaviour of light, reflection, and refraction. Previous year's question papers had around 5-7 questions related to this chapter. The solutions provide clear explanations, step-by-step guidance, and illustrative diagrams to aid comprehension. Using these resources effectively, students can strengthen their understanding of light phenomena and improve their exam performance. Mastering this chapter is essential for building a solid foundation in science and progressing confidently in their academic journey.


NCERT Solutions for Class 7 Science - Chapter-wise Link for FREE PDF



Additional Study Materials for Class 7 Science

Along with this, students can also download additional study materials provided by Vedantu for CBSE Class 7 Science–


FAQs on NCERT Solutions for Class 7 Science Chapter 11 - Light

1. What is lens class 7?

Class 7 Science introduces a lens as a transparent material curved on either one or both sides. The primary function of a lens is to refract or bend light rays as they pass through it, which enables it to form images. Lenses are classified into two main types:

  1. Convex Lens: A convex lens is thicker at the centre and thinner at the edges. When light rays pass through a convex lens, they converge or come together at a point on the other side of the lens. Convex lenses are commonly used in magnifying glasses, cameras, and microscopes.

  2. Concave Lens: A concave lens is thinner at the centre and thicker at the edges. Light rays diverge or spread apart when they pass through a concave lens. Unlike convex lenses, concave lenses cannot form real images. They are often used in applications that aim to spread out light rays, such as correcting nearsightedness in eyeglasses.

In Light Class 7 Questions and Answers, students learn about the basic properties and uses of lenses and how they contribute to the formation of images.

8. How can NCERT Solutions for Class 7 Science Chapter 11 help me understand the formation of images by mirrors and lenses?

The NCERT Solutions delve into the principles of reflection and refraction, which are essential for understanding how images are formed by mirrors and lenses. Step-by-step explanations and practical examples help students grasp these concepts effectively.

3. Which Principles of Light have been Described in the 11th Chapter of NCERT Solutions of Class 7?

Some of the essential characteristics of light that this chapter describes are, how the light only travels in a straight line, the difference of image between various lenses. Furthermore, it describes the reflection of light, spherical mirror, the colour of sunlight.

4. List out the important topics covered in the Chapter 11 of NCERT Solutions for Class 7 Science.

Concave lens, Concave mirror, Convex lens, Convex mirror, Erect image, Magnified image, Magnifying glass, Prism, Rainbow, Real image, Rear view mirror, Side mirror, Spherical mirror and Virtual image are the important topics covered in Chapter 11 of NCERT Solutions of Class 7 Science. Students will study about many concepts of light, such as reflection, in this chapter. This chapter is divided into many sections, each of which discusses a crucial principle of light. It starts with a description of light and then continues on to the notion of how light travels in a straight path. It goes on to describe how light is reflected and how lenses produce pictures.

5. What is the advantage of using the NCERT Solutions for Class 7 Science Chapter 11?

The NCERT Solutions for Chapter 11 of Class 7 Science are created in accordance with CBSE guidelines. As a result, students may better prepare according to their curriculum. The use of simple language and thorough explanations of each topic assists students in readily comprehending the concepts. Furthermore, the utilization of real-life examples allows pupils to easily correlate with diverse concepts. The use of graphs, charts, and images enhances the learning process and helps students better comprehend a topic. The answers are written in such a way that they will assist students achieve higher grades on the final test. These answers are available on Vedantu’s official website (vedantu.com) and mobile app free of cost.

6. What is reflection of light?

Reflection of light is a phenomenon introduced in Chapter 11 of Class 7 Science. Students have previously learned how mirrors may change the direction of light, thus it is also considered a reflection of light. Several exercises sprinkled throughout this part of NCERT answers for Class 7 Science Chapter 11 might help students grasp this topic better. One of them is to hold a lit candle up to a mirror. Now, move it around to see how different light reflections look.

7. What is a virtual image?

A virtual picture is formed when light beams appear to originate at a specific location but do not really meet. It is apparent to the naked eye. As a result, rear-view mirrors display virtual pictures. The following are examples of scenarios in which a virtual picture is generated. When reflected rays seem to collide, it forms. Such pictures are not possible to produce on a computer screen. In the plane mirror and convex mirror, virtual pictures are always generated.

8. What are the properties of an image formed by a mirror?

There are a lot of properties of an image formed by a plane mirror. A plane mirror produces an upright picture. This is a virtual replica of the thing that's the same size as it is. Behind the mirror, the picture is the same distance as the item in front of it. The left side of an item appears on the right side of an image created by a mirror, whereas the right side appears on the left side.