Light Class 8 Case Study Questions Science Chapter 13

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Last Updated on October 30, 2024 by XAM CONTENT

Hello students, we are providing case study questions for class 8 science. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 8 science. In this article, you will find case study questions for cbse class 8 science chapter 13 Light.

Chapter	Light
Type of Questions	Case Study Questions
Nature of Questions	Competency Based Questions
Board	CBSE
Class	8
Subject	Science
Useful for	Class 8 Studying Students
Answers provided	Yes
Difficulty level	Mentioned
Important Link	Class 8 Science Chapterwise Case Study

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Table of Contents

Case Study Questions on Light

Questions

Question 1:

Read the given passage below and answer the question:

The picture shows a light ray from a candle falling on a mirror. P, Q, R, S and T are five points behind the mirror.

(i) Which arrow represents the light ray reflected by the mirror?
(a) Arrow 1
(b) Arrow 2
(c) Arrow 3
(d) Arrow 4

Difficulty Level: Easy

Ans. Option (c) is correct.
Explanation: Arrow 3 represents the light ray reflected by the mirror because according to the law of reflection, the angle of incidence is always equal to the law of reflection.

(ii) At which point will the image of the candle form? Will the image be erect or inverted?

Difficulty Level: Easy

Ans. The image of the candle will be formed at point Q. It will be erect.

Question 2:

The diagram shows the basic parts of human eye.

Light Class 8 Case Study Questions Science Chapter 13 - 1

Q. 1. Which part protects the human eye from injury?
(a) Iris
(b) Lens
(c) Retina
(d) Cornea
(Easy)

Difficulty Level: Easy

Ans. Option (d) is correct.
Explanation: The cornea protects the eye from injury.

The picture shows the size of the pupil under two different conditions.

Light Class 8 Case Study Questions Science Chapter 13 - 2

Q. 2. What makes the pupil change size between conditions 1 and 2? (Medium)

Difficulty Level: Medium

Ans. The brightness of the light or the intensity of light entering the eye makes the pupil change size.

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Important Keywords from Light

Reflection: The mirror surface or a shiny surface scatters back a beam of light falling on it. This scattering back of light by mirror or shiny surface is known as reflection.

Luminous Objects: The objects which shine in the light of other objects are called illuminated objects. The objects which emit their own light are known as luminous objects.

Dispersion: Splitting of light into its constituent colours is called dispersion. The sunlight is referred to as white light which consists of seven colours.

Also check

Topics from which case study questions may be asked

Reflection
Human Eye
Kaleidoscope and Periscope
Artificial Intelligence

Visibility of any object is due to the entry of light from that object into our eyes. This light can either be emitted or reflected from that object.

A light ray striking any polished or shiny surface is reflected in another direction. This reflection of light is governed by the Laws of Reflection.

Reflection is produced by not only light rays but by all the waves namely, electromagnetic waves, sound waves and waves that form on the water’s surface.

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Frequently Asked Questions (FAQs) on Light Case Study Questions

Q1: What are case study questions for CBSE examinations?

A1: Case study questions in CBSE examinations typically involve scenarios or real-life examples, requiring students to apply their understanding of concepts to solve problems or analyze situations.

Q2: Why are case study questions important for understanding class 8 science chapters?

A2: Case study questions provide a practical context for students to apply theoretical knowledge to real-world situations, fostering deeper understanding and critical thinking skills.

Q3: How should students approach answering case study questions for CBSE?

A3: Students should carefully read the case study, identify the key issues or problems presented, analyze the information provided, apply relevant concepts and principles of sound, and formulate well-supported solutions or responses.

Q4: Are there any resources available online for students to practice case study questions on class 8 science chapters for CBSE exams?

A4: Yes, several educational websites offer case study questions for CBSE students preparing for science examinations. We also offer a collection of case study questions for all classes and subject on our website. Visit our website to access these questions and enhance your learning experience.

Q5: How can students effectively prepare for case study questions on Light for CBSE exams?

A5: Effective preparation strategies include regular revision of concepts, solving practice questions, analyzing case studies from previous exams, seeking clarification on doubts, and consulting with teachers or peers for guidance and support.

Q6: How can teachers incorporate case study questions on Light class 8 science into classroom teaching?

A6: Teachers can integrate case studies into lesson plans, group discussions, or interactive activities to engage students in active learning, promote problem-solving skills, and facilitate a deeper understanding of concepts of sound.

Q7: Boojho while waving his hand very fast in front of his eyes, observes that his fingers do not appear clear. Give the reason for it.

A7: Our eyes are not so sensitive for a large speed and when any object is very near, the ciliary muscles cannot focus on the object so early.

Q8: What is lateral inversion?

A8: In an image formed by a mirror, the leftside of the object appears on the right and the right appears on the left. This is known as lateral inversion.

Q9: How do we get numerous beautiful patterns in a kaleidoscope?

A9: Large number of images are formed by mirrors placed at an angle to one another. This phenomena of number of images formed by mirrors placed at an angle to one another is used in a kaleidoscope to make numerous beautiful patterns.

Q10: Which disease of eye is caused by nutritional deficiency? Which nutrient should be added in the diet for healthy eyes? Which food items contain this nutrient?

A10: Night Blindness is caused due to deficiency of Vitamin A in diet. Vit A should be incorporated in diet for healthy eyes. Raw carrots, broccoli and green vegetables (such as spinach) and cod liver oil are rich in vitamin A. Eggs, curd, cheese, butter and fruits such as papaya and mango are also rich in vitamin A.