CBSE Class 6 Science Chapter 11 Light NCERT Solutions

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NCERT Solutions PDF Class 6 PDF

This chapter, 'Light,' for CBSE Class 6 Science, explores the fundamental properties of light. The NCERT Solutions offer clear explanations on how light travels in straight lines, the formation of images using pinhole cameras, and the role of mirrors in reflection. Students will learn how light interacts with objects, which is essential for us to see. The solutions break down complex concepts into understandable steps, making exam revision more effective and building a solid foundation in the principles of light. This resource aims to enhance comprehension of light's behavior and its applications, ensuring a thorough understanding for all learners.

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Quick info

BoardCBSE
ClassClass 6
SubjectScience Exemplar
Session2026
LanguageEnglish
TypeNCERT Solutions
ChapterChapter 11

Chapter summary

Chapter 11, 'Light,' for Class 6 Science NCERT Solutions focuses on the basic behavior of light. It covers topics like the rectilinear propagation of light, which explains how light travels in straight lines, and the formation of images through pinhole cameras, demonstrating inversion and lateral inversion. The solutions also touch upon reflection using mirrors. This chapter aims to provide a foundational understanding of light phenomena relevant to everyday observations.

Learning outcomes

  • Understand that light travels in straight lines.
  • Explain the working of a pinhole camera and the nature of the image formed.
  • Identify the role of mirrors in reflecting light.
  • Differentiate between various ways of observing a light source through different objects.

Topics covered

Paper topics

  • Light
  • Rectilinear Propagation of Light
  • Pinhole Camera
  • Image Formation
  • Reflection
  • Mirrors
  • Observation of Light Sources

Important topics

  • Rectilinear Propagation of Light
  • Pinhole Camera Image Formation
  • Reflection by Mirrors

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Questions and Solutions

Question 1

Observe the picture given in fig 11.1 carefully. A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?

Options:

  1. A glass sheet
  2. A mirror
  3. A sheet of white paper

Refer to Figure 11.1 showing a torch, position A, and screen B.

Solution:

The correct option is (b) A mirror.

To obtain a specific patch of light at position B, the object at position A must be able to reflect the light from the torch in a controlled direction. A mirror is designed to reflect light. A glass sheet would allow light to pass through it, and a sheet of white paper would scatter the light in many directions, not forming a concentrated patch.

Question 2

A student observes a tree given in figure 11.2 through a pinhole camera. Which of the diagrams given in figures (a) to (d) depicts the image seen by her correctly?

Refer to Figure 11.2 showing a tree and Figure 11.3 showing four possible image diagrams (a), (b), (c), and (d).

Solution:

The correct option is (b).

A pinhole camera forms an image that is inverted (upside down) and laterally inverted (left-right reversed). Therefore, the image of the tree seen by the student will be upside down and also flipped horizontally. Option (b) correctly shows the tree inverted.

Question 3

Four students A, B, C and D looked through pipes of different shapes to see a candle flame as shown in fig 11.4. Which student will be able to see the candle flame?

Refer to Figure 11.4 showing four students (A, B, C, D) looking through pipes of different shapes towards a candle flame.

Solution:

Student C will be able to see the candle flame.

Light travels in straight lines. This property is known as the rectilinear propagation of light. Student C is looking through a straight pipe, which allows the light from the candle flame to travel in a straight line directly to their eye. The pipes held by students A, B, and D are bent, which obstructs the straight path of light, preventing them from seeing the flame.

Common mistakes

  • Confusing reflection with other optical phenomena.
  • Incorrectly predicting the image orientation in a pinhole camera.
  • Assuming light can bend around corners without a reflecting surface.

Revision tips

  • Review the concept of rectilinear propagation of light to understand shadow formation.
  • Visualize how a pinhole camera works by drawing diagrams.
  • Practice identifying the type of image formed by different optical devices.
  • Relate the concepts of light to everyday observations like rainbows and shadows.

Practice MCQs

Q1. What is needed at position A to obtain a patch of light at B, as shown in Figure 11.1?

Q2. When observing a tree through a pinhole camera, what kind of image is formed?

Q3. Which student in Figure 11.4 can see the candle flame through their pipe?

Frequently asked questions

What is the main concept covered in CBSE Class 6 Science Chapter 11?

Chapter 11, 'Light,' for Class 6 Science NCERT Solutions primarily covers the basic properties of light, including how it travels in straight lines (rectilinear propagation), how images are formed using a pinhole camera, and the concept of reflection using mirrors.

How do these NCERT Solutions help students?

These solutions provide clear, step-by-step explanations for each question, helping students understand the concepts of light, image formation, and reflection. They are designed to reinforce learning and aid in exam preparation.

What is a pinhole camera and what kind of image does it form?

A pinhole camera is a simple device that forms an image by allowing light to pass through a small hole (pinhole) into a dark box. It forms an image that is inverted (upside down) and laterally inverted (left-right reversed).

Why can only student C see the candle flame in Figure 11.4?

Student C can see the candle flame because light travels in straight lines. The pipe held by student C is straight, allowing a direct line of sight to the flame. The pipes of students A, B, and D are bent, blocking the path of light.

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