- The Human Eye and the Colourful World Class 10 Case Study Questions Science Chapter 11
Last Updated on August 30, 2024 by XAM CONTENT
Hello students, we are providing case study questions for class 10 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 10 science. In this article, you will find case study questions for cbse class 10 science chapter 11 The Human Eye and the Colourful World.
Table of Contents
Case Study Questions on The Human Eye and the Colourful World
Question 1:
Read the following and answer the questions given below:
Light of all the colour travel at the same speed in vacuum for all wavelengths. But in any transparent medium (glass or water), the light of different colours travel with different speeds for different wavelength that means that the refractive index of a particular medium is different for different wavelength. As there is a difference in their speeds, the light of different colour bend through different angles. The speed of violet colour is maximum and the speed of red colour is minimum in glass so, the red light deviates least and violet colour deviates most. Hence, higher the wavelength of a colour of light, smaller the refractive index and less is the bending of light.
λ r > λ v and r n < v n . Also frequency, ν = c/λ.
(i) Which of the following statements is correct regarding the propagation of light of different colours of white light in air? (a) Red light moves fastest. (b) Blue light moves faster than green light. (c) All the colours of the white light move with the same speed. (d) Yellow light moves with the mean speed as that of the red and the violet light.
Difficulty Level: Medium
Ans. Option (c) is correct. Explanation: All the colours of the white light move with the same speed in air.
(ii) Which of the following is the correct order of wavelength? (a) Red > Green > Yellow (b) Red > Violet > Green (c) Yellow > Green > Violet (d) Red > Yellow > Orange
Difficulty Level: Easy
Ans. Option (c) is correct. Explanation: The increasing order of wavelength of visible spectrum is Violet < Indigo < Blue < Green < Yellow < Orange < Red So, the correct order is Yellow > Green > Violet
(iii) Which of the following is the correct order of speed of light in glass? (a) Red > Green > Blue (b) Blue > Green > Red (c) Violet > Red > Green (d) Green > Red > Blue
Ans. Option (b) is correct. Explanation: The more be the wavelength, more be the speed.
(iv) Which colour which has maximum frequency (a) Red (b) Violet (c) Blue (d) Green
Ans. Option (b) is correct. Explanation: Frequency is inversely proportional to the wavelength. Violet has minimum wavelength among all these colours, so violet has maximum frequency.
(v) Which of the following is the correct order of angle of deviation? (a) Red > Green > Blue (b) Blue > Yellow > Orange (c) Orange > Red > Green (d) Blue > Green > Violet
Ans. Option (b) is correct. Explanation: The angle of deviation is more for more refractive index.
Question 2:
The spreading of light by the air molecules is called scattering of light. The light having least wavelength scatters more. The sun appears red at sunrise and sunset, appearance of blue sky it is due to the scattering of light. The colour of the scattered light depends on the size of particles. The smaller the molecules in the atmosphere scatter smaller wavelengths of light. The amount of scattering of light depends on the wavelength of light. When light from sun enters the earth’s atmosphere, it gets scattered by the dust particles and air molecules present in the atmosphere. The path of sunlight entering in the dark room through a fine hole is seen because of scattering of the sun light by the dust particles present in its path inside the room.
(i) To an astronaut in a spaceship, the colour of earth appears (a) red (b) blue (c) white (d) black
Ans. Option (b) is correct. Explanation: Light is scattered by the air molecules present in atmosphere.
(ii) At the time of sunrise and sunset, the light from sun has to travel. (a) longest distance of atmosphere (c) both (a) and (b) (b) shortest distance of atmosphere (d) can’t say
Ans. Option (a) is correct. Explanation: As the distance between us and sun is more at the time of sunrise and sunset.
(iii) The colour of sky appears blue, it is due to the (a) refraction of light through the atmosphere (b) dispersion of light by air molecules (c) scattering of light by air molecules (d) all of these.
Ans. Option (c) is correct. Explanation: Due to the more scattering of blue colour by molecules of air.
(iv) At the time of sunrise and sunset (a) Blue colour scattered and red colour reaches our eye (b) Red colour scattered and blue colour reaches our eye (c) Green and blue scattered and orange reaches our eye (d) None of these
Ans. Option (a) is correct. Explanation: Red light being of largest wavelength blue scatter more, red scattered least.
(v) The danger signs made red in colour, because (a) the red light can be seen from farthest distance (b) the scattering of red light is least (c) both (a) and (b) (d) none of these
Ans. Option (c) is correct. Explanation: Scattering is least but velocity of red light is more.
- Electricity Class 10 Case Study Questions Science Chapter 12
- Metals and Non-metals Class 10 Case Study Questions Science Chapter 3
- Light – Reflection and Refraction Class 10 Case Study Questions Science Chapter 10
- Life Processes Class 10 Case Study Questions Science Chapter 6
Acids Bases and Salts Class 10 Case Study Questions Science Chapter 2
Chemical reactions and equations class 10 case study questions science chapter 1, topics from which case study questions may be asked.
- Structure of the Human Eye
- Functioning of the Eye
- Defects of Vision and Their Correction
- Prism and the Refractive Index
- Dispersion of Light
- Atmospheric Refraction
- Scattering of Light
Case study questions from the above topics may be asked.
Helpful Links for CBSE Class 10 Science Preparation
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Frequently Asked Questions (FAQs) on The Human Eye and the Colourful World 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 10 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 chemical reactions and equations, and formulate well-supported solutions or responses.
Q4: Are there any resources available online for students to practice case study questions on class 10 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. If you need more case study questions for your preparation, then you visit Physics Gurukul website.
Q5: How can students effectively prepare for case study questions on The Human Eye and the Colourful World 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 The Human Eye and the Colourful World class 10 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 The Human Eye and the Colourful World.
Q7: What is the power of accommodation of a normal eye?
Ans. A normal eye has a power of accommodation which enables objects as far as infinity and as close as 25 cm to be focussed on the retina.
Q8: What is meant by spherical aberration of a lens?
A8: The inability of a lens to bring all the rays coming from a point object to focus at a single point is known as spherical aberration.
Q9: Is the focal length of our eye lens fixed?
Q10: what is astigmatism how is it corrected.
A10: It is that defect of the eye due to which the image of a distant point source of light is formed, not as a point but as a vertical or a horizontal line. It can be corrected by using cylindrical lenses.
Q11: White light consists of seven colours. Is the refractive index of glass same for all colours?
A11: The refractive index of glass is different for each of the colours.
Q12: When a monochromatic light passes through a prism, will it show dispersion?
A12: No, it will not show any dispersion but will show only deviation.
Q13: When does an object appear black?
A13: When it absorbs all the colours incident on it.
Q14: Why does a rose appear red in daylight?
A14: Because it reflects only red colour to our eye, out of all the seven colours of sun light falling on it.
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Case Study Questions Class 10 Science
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Download Case study questions for CBSE class 10 Science in PDF format from the myCBSEguide App . We have the new pattern case study-based questions for free download. Class 10 Science case study questions
This article will guide you through:
What are case study questions?
- Sample Papers with Case Study questions
- Class 10 Science Case Study question examples
- How to get case-based questions for free?
- How to attempt the case-based questions in Science?
Questions based on case studies are some real-life examples. The questions are asked based on a given paragraph i.e. Case Study. Usually, 4-5 questions are asked on the basis of the given passage. In most cases, these are either MCQs or assertion & reason type questions. Let’s take an example to understand. There is one paragraph on how nitrogen is generated in the atmosphere. On the basis of this paragraph, the board asks a few objective-type questions. In other words, it is very similar to the unseen passages given in language papers. But the real cases may be different. So, read this article till the end to understand it thoroughly.
What is CBE?
CBSE stands for competency-based education. The case study questions are part of this CBE. The purpose of CBE is to demonstrate the learning outcomes and attain proficiency in particular competencies.
Questions on Real-life Situations
As discussed the case study questions are based on real-life situations. Especially for grade 10 science, it is very essential to have the practical knowledge to solve such questions. Here on the myCBSEguide app, we have given many such case study paragraphs that are directly related to real-life implications of the knowledge.
Sample Papers with Case Study Questions
Class 10 Science Sample Papers with case study questions are available in the myCBSEguide App . There are 4 such questions (Q.No.17 to 20) in the CBSE model question paper. If you analyze the format, you will find that the MCQs are very easy to answer. So, we suggest you, read the given paragraph carefully and then start answering the questions. In some cases, you will find that the question is not asked directly from the passage but is based on the concept that is discussed there. That’s why it is very much important to understand the background of the case study paragraph.
CBSE Case Study Sample Papers
You can download CBSE case study sample papers from the myCBSEguide App or Student Dashboard. Here is the direct link to access it.
Case Study Question Bank
As we mentioned that case study questions are coming in your exams for the last few years. You can get them in all previous year question papers issued by CBSE for class 1o Science. Here is the direct link to get them too.
Class 10 Science Case Study Question Examples
As you have already gone through the four questions provided in the CBSE model question paper , we are proving you with other examples of the case-based questions in the CBSE class 10 Science. If you wish to get similar questions, you can download the myCBSEguide App and access the Sample question papers with case study-type questions.
Case-based Question -1
Read the following and answer any four questions: Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salt bed of rack salt was formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, and bleaching powder.
- Phosphoric acid
- Carbonic acid
- Hydrochloric acid
- Sulphuric acid
- Blue vitriol
- Washing soda
- Baking soda
- Bleaching powder
Case-based Question -2
- V 1 + V 2 + V 3
- V 1 – V 2 +V 2
- None of these
- same at every point of the circuit
- different at every point of the circuit
- can not be determined
- 20 3 Ω 203Ω
- 15 2 Ω 152Ω
Case-based Question -3
- pure strips
- impure copper
- refined copper
- none of these
- insoluble impurities
- soluble impurities
- impure metal
- bottom of cathode
- bottom of anode
How to Attempt the Case-Based Questions in Science?
Before answering this question, let’s read the text given in question number 17 of the CBSE Model Question Paper.
All living cells require energy for various activities. This energy is available by the breakdown of simple carbohydrates either using oxygen or without using oxygen.
See, there are only two sentences and CBSE is asking you 5 questions based on these two sentences. Now let’s check the first questions given there.
Energy in the case of higher plants and animals is obtained by a) Breathing b) Tissue respiration c) Organ respiration d) Digestion of food
Now let us know if you can relate the question to the paragraph directly. The two sentences are about energy and how it is obtained. But neither the question nor the options have any similar text in the paragraph.
So the conclusion is, in most cases, you will not get direct answers from the passage. You will get only an idea about the concept. If you know it, you can answer it but reading the paragraph even 100 times is not going to help you.
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