CBSE Class 6 Science Important Questions Chapter 11 - Light, Shadows and Reflections - Free PDF Download
Very Short Answer Questions: 1 Mark
Define the following:
1. Luminous objects
Ans: Luminous items are those that can produce their own light. Luminous items include the sun, star, moon, lit candle, and so on.
2. Non-luminous objects
Ans: Non-luminous items are those that do not produce their own light. Non-luminous things include books, cardboard, cloth, and paper.
3. Transparent
Ans: Transparent objects are those that allow all light to pass through them fully. These things allow one to see right through them. Transparent items include air, clear water, and cellophane tape.
4. Translucent
Ans: Translucent objects are those that allow just a small amount of light to flow through them. One can only see through such items partially and not very well.
Translucent things include oiled paper, coloured glass panes, coloured solutions, and so forth.
5. Opaque
Ans: Opaque objects are those that do not allow any light to flow through them at all.
These items are impossible to see through. Opaque items include cardboard, metal, wood, and other materials.
Short Answer Questions: 3 Marks
6. What are shadows? Mention the properties of shadows.
Ans: A shadow is a dark area created by an opaque object blocking light from a source of light.
Shadow of any object/person is erect.
Shadow forms a real image.
7. Demonstrate that light moves in a straight line.
Ans: Stepwise process to demonstrate that light moves in a straight line:
Light a candle.
See the burning candle through a straight pipe (shown below).
Second time, view the burning candle through a bent pipe (shown below).
Result: The first time you viewed the candle through a straight pipe light reached your eyes whereas in the second attempt you could not see the light.
8. Classify the following objects as luminous or non-luminous: Air, star, book, torch, lit matchstick, burning candle.
Ans:
9. Classify the following as transparent, translucent or opaque: Oiled paper, clear water, aluminium foil, cardboard, air, coloured glass pane.
Ans:
10. What is a mirror? How does it work?
Ans: A smooth shiny surface that reflects a clear image of an item is referred to as a mirror. The image in the mirror is created by light rays reflecting off the surface. The object's light hits the mirror and bounces or reflects back at the same angle. The image of the thing in the mirror is created by the reflection of light rays. Mirrors are often made of glass with a metal coating. Due to reflections, the images generated in the mirror are inverted.
Long Answer Questions: 5 Marks
11. Explain the construction of a pinhole camera.
Ans: A pinhole camera is made up of two boxes that may simply slide into each other without leaving any gaps. Each box has one side ripped out. A small pinhole is formed in the centre of the larger box's opposite surface. A little square is glued on the opposite surface of the smaller box. A translucent paper is used to cover the sliced portion. The pinhole in the smaller box is facing the square strip as it is slid into the larger box. The open face of the little box is used to observe a distant object while keeping light from behind blocked out. The smaller box is dragged forward or backwards until the object's picture is obtained on the larger box screen that is translucent.
CBSE Class 6 Science Chapter 11 Important Questions Overview
Class 6 Science chapter 11 important questions PDF contain three sections, namely – A (very short answer questions, B (short answer questions) and C (long answer questions). Please go through the following sections to have an idea about the solutions for each problem.
Important Questions for Class 6 Science Chapter 11: Section A
The first section in class 6 Science chapter 11 important questions PDF contains five very short answer type problems carrying 2 marks each. Here, you are supposed to provide a precise definition of specific terms like luminous objects, non-luminous objects, transparent, translucent and opaque.
Please study from this solution material for brief yet precise answers, so that you can get full scores in exams.
Important Questions for Class 6 Science Chapter 11: Section B
Question 1: The first question in section B is about shadows and its properties. You need to provide an error-free definition of what is meant by shadows and what are the essential features of the same. Like for instance, shadows can be only obtained on a screen, etc.
Question 2: This question demands to explain how light travels in a straight direction. Here in this PDF, a diagram illustrating the path of light is provided to make you understand better.
Question 3: Here, you need to classify air, star, torch, book, lit matchstick and burning candle based on luminous and non-luminous objects.
Question 4: This question is similar to the previous one. But here you are required to classify certain things (oiled paper, clear water, cardboard, air, aluminium foil, coloured glass pane) as transparent, opaque or translucent.
Question 5: This question is about a mirror and its working. By going through the answer, you will get to know how images are formed due to the reflection of light. Plus, the entire description is depicted with the help of a picture as well.
Important Questions for Class 6 Science Chapter 11: Section C
This section contains only one question which carries 5 marks and asks you to write about the construction of a pinhole camera. Besides, a diagrammatic representation is also provided for you to understand the overall set up of a pinhole camera.
Hence, without wasting much time, visit Vedantu’s website and download the PDF of important questions of chapter 11 Science class 6. It is an excellent tool for preparation before exams.
Important Related Links for CBSE 6 Science
Conclusion
The Class 6 CBSE Science Chapter 11 notes on "Light, Shadows, and Reflections," available as free PDF downloads, are invaluable educational resources. These notes simplify the complex concepts of optics, making them accessible to young learners. They provide comprehensive coverage of the chapter, ensuring a well-rounded understanding of the subject matter. Moreover, these notes foster critical thinking and practical application of scientific principles. Being accessible as free PDF downloads ensures equitable access to quality educational materials. Ultimately, these notes enrich the learning experience, instilling a profound appreciation for the intriguing phenomena of light, shadows, and reflections that shape our world and our understanding of it.
FAQs on Important Questions for CBSE Class 6 Science Chapter 11 - Light, Shadows and Reflections
1. What are the units of class 6 Science CBSE?
CBSE Class 6 Science comprise of 16 chapters. The names are Food: Where Does It Come From, Fibre to Fabric, Getting to Know Plants, Components of Food, Changes Around Us, Sorting Materials into Groups, Fun with Magnets, Water, Body Movements, Separation of Substances, Air Around Us, The Living Organisms and Their Surroundings, Water, Garbage In, Garbage Out, Body Movements, Motion and Measurement of Distances and Electricity and Circuits.
2. What are luminous and non-luminous objects?
To define, luminous objects are considered the ones that give out light of their own. You can even see a luminous object in the dark, as they produce their light. On the other hand, the items that do not give out light of their own are regarded as non-luminous.
Some examples of luminous objects are the sun, star, electric bulb, burning candles, lit matchstick, television, fireflies, etc. Similarly, some examples of non-luminous things are chair, wall, bus, plants, clothes, pen, mirror, earth, buildings, etc.
3. What are the fundamental characteristics of a pinhole camera?
There are several essential features of a pinhole camera. Firstly, the image that you see in a pinhole camera is inverted. Secondly, the image formed on the screen of a pinhole camera is real. Thirdly, the colour of the image also remains the same. Fourthly, the size of the image can be lesser, greater or equal to the size of the real object. Lastly, pinhole cameras can also be utilised to click photos, provided a photographic film is put on the screen.
4. How are shadows formed for Class 6?
Shadows are a result of obstruction to the path of light. When there is a luminous object and the light rays from it are incident on a surface and in between there is any object that obstructs the path of that light ray then a black or dark region is formed on that surface that resembles the shape of the object obstructing the path. If you study class 6 Science chapter 11 notes and solutions from the website of Vedantu (vedantu.com) you will get a clear idea for this topic.
5. Why was Naman unable to get the image of a well-lit object?
Naman was experimenting with a pinhole camera to obtain the image of a well-lit object. But he failed to do so since the hole made in his pinhole camera was much bigger than what it should have been, which might have resulted in the scattering of the light rays and hence the failure in obtaining a proper image of it. His mistake was observed and rectified by his brother who knew the features of a pinhole camera and how it worked.
6. How do shadows form? Differentiate between shadow and reflection class 6.
Shadows and reflections both are phenomena related to light or optics. But there is a difference in the nature of the two. When you talk about shadows, it is usually a blockage caused by an opaque object in the path of the light ray while reflection is the change in the direction of light rays after hitting a surface in order to form an image. Shadows are not images but only a dark region or outline whereas reflections give a proper image either real or virtual.
7. What is the meaning of a translucent object?
You are able to see through an object; it means that the object is allowing light to pass through it. But in the case of translucent objects, the light rays are only allowed to pass partially so that there is neither complete obstruction nor complete transparency. This will result in partial visibility as well, which means you will be able to see partially through that object for example coloured glass, oiled paper etc. You can read the Important questions of this chapter from the vedantu app to know better.
8. Can I find answers for chapter 11 Science?
Yes, you can find the answers to all your doubts and queries of chapter 11 Science class 6 on the website of Vedantu. Here you can get chapter notes, revision notes, exercise solutions, pdfs etc for the chapter. And it is a hassle-free process where you can simply visit their website and refer to things that you need. There are options to download these solutions and important questions for free as well. This is a trusted site and is quite famous among students, parents and teachers.