Apurva Institute
11. Human Eye and Colourful World-Exercise Science Class 10 In English
Last Updated : 06 March 2026
Explore science Solutions for Class 10 Chapter 11. Human Eye and Colourful World Topic Exercise in English medium.
11. Human Eye and Colourful World-Exercise Science Class 10 In English
Last Updated : 06 March 2026
11. Human Eye and Colourful World-Exercise Science Class 10 In English
11. Human Eye and Colourful World
Exercise
Exercise : Chapter 11
Q1. The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to
(a) presbyopia.
(b) accommodation.
(c) near-sightedness.
(d) far-sightedness.
Ans: (b) accommodation.
Q2. The human eye forms the image of an object at its
(a) cornea. (b) iris (c) pupil. (d) retina.
Ans: (d) retina
Q3. The least distance of distinct vision for a young adult with normal vision is about
(a) 25 m.
(b) 2.5 cm.
(c) 25 cm.
(d) 2.5 m.
Ans: (c) 25 cm
Q4. The change in focal length of an eye lens is caused by the action of the
(a) pupil.
(b) retina.
(c) ciliary muscles.
(d) iris.
Ans: (c) ciliary muscles
Q5. A person needs a lens of power –5.5 dioptres for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting (i) distant vision, and (ii) near vision?
Ans:
Q6. The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?
Ans:
Q7. Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.
Ans:
Q8. Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
Ans: The minimum distance of distinct vision of a human is 25cm. Rays of light reflected off an object placed at a distance of less than 25 cm will not make the object visible on the retina. Because the capacity of the human eye cannot be increased by 25 cm.
Q9. What happens to the image distance in the eye when we increase the distance of an object from the eye?
Ans: Image distance always remains the same. The reason for this is that the distance of the object, the focal length of the lens of the human eye is adjusted in such a way that the image is formed on the retina.
Q10. Why do stars twinkle?
Ans: The refractive index of the Earth's atmosphere is constantly changing. The light of the stars entering the eyes remains irregular due to constant refraction and due to that flicker the stars appear to twinkle.
Q11. Explain why the planets do not twinkle.
Ans: Earth's distance from the planets is very less. Planets are stores of light. The light rays that come from the planets do not have refraction. Their position does not change with the proximity and the store of light, so they do not appear to twinkle.
Q12. Why does the Sun appear reddish early in the morning?
Ans: The sun is on the horizon at sunrise or sunset. In that case, the sun's rays first reach the thick layers of air in the earth's atmosphere, after that to our eyes. Most of the light of short wavelength is scattered by the particles of the atmosphere. In this way only long light rays (red) can enter our eyes and we see the sun as blood-stained.
Q13. Why does the sky appear dark instead of blue to an astronaut?
Ans: Due to the absence of an atmosphere in space, there is no scattering of light, because only the fine particles of the air scatter the light. This is the reason why the sky appears black to the astronauts.
Why Our NCERT Solutions Is Matters For Your Study?
NCERT Solutions are one of the most trusted study resources for students preparing for school exams and board examinations. These solutions help students understand every concept clearly and improve their academic performance. In today’s competitive education system, simply reading the textbook is not enough. Students need proper explanations and accurate answers to understand topics in depth. That is why NCERT Solutions for Classes 6 to 12 are considered essential for effective learning and exam preparation.
On this page, students can find latest NCERT Solutions prepared according to the current CBSE syllabus. These solutions are created by subject experts to help students understand every question in a simple and easy way. With the help of chapter-wise NCERT answers, students can quickly revise important topics and strengthen their concepts. Whether you are preparing for school tests, annual exams, or board exams, these NCERT textbook solutions will guide you step by step.
NCERT Solutions for Class 10 science Chapter 11. Human Eye and Colourful World Topic Exercise
NCERT Solutions for Class 10 science Chapter 11. Human Eye and Colourful World Topic Exercise are prepared to help students understand important concepts of the chapter in a simple and clear manner. These solutions are based on the latest CBSE syllabus and follow the official NCERT textbooks. Students who are searching for accurate answers and step-by-step explanations can use these solutions to improve their learning and prepare better for school exams as well as board examinations.
In this section you will find Class 10 science NCERT Solutions covering important questions, explanations and concept-based answers. Each question from the NCERT book is solved carefully so that students can understand how to write answers correctly in examinations. These solutions are also useful for quick revision before tests and assignments.
Why NCERT Solutions Are Important for Class 10 science
NCERT books are considered the most reliable study material for CBSE students. Most examination questions are directly based on NCERT textbooks. Therefore studying NCERT Solutions for Class 10 science helps students understand the exact pattern of questions and the correct method of answering them.
By practicing the questions from Chapter 11. Human Eye and Colourful World, students can strengthen their conceptual knowledge and improve their analytical thinking skills. These solutions also help students identify the most important topics and prepare effectively for school examinations.
About Chapter 11. Human Eye and Colourful World of Class 10 science
Chapter 11. Human Eye and Colourful World is an important part of the Class 10 science syllabus. This chapter explains several key concepts which are essential for understanding the subject in detail. Students often face difficulties while solving textbook questions related to this chapter. That is why NCERT Solutions for Chapter 11. Human Eye and Colourful World are provided to explain every concept in a simple and structured way.
The explanations provided here follow the official NCERT approach so that students can easily relate them to their textbook content. By studying these answers carefully, students can learn how to structure their answers and present them clearly in exams.
Understanding Topic: Exercise
The topic Exercise plays a significant role in Class 10 science Chapter 11. Human Eye and Colourful World. Students must understand this topic clearly because it often appears in examinations in the form of short answer or long answer questions. The solutions provided here explain the topic in a step-by-step format so that students can easily grasp the concept.
By studying Exercise carefully, students can build a strong foundation in the subject and improve their overall academic performance. These solutions also help students revise the topic quickly before examinations.
Benefits of Using NCERT Solutions
- Concept clarity: Each answer explains the concept in simple language.
- Exam preparation: Solutions follow the CBSE exam pattern.
- Quick revision: Students can revise important questions quickly.
- Accurate answers: All solutions are based on the official NCERT textbook.
- Better understanding: Step-by-step explanations improve learning.
Students studying NCERT Solutions for Class 10 science Chapter 11. Human Eye and Colourful World can easily understand the important points of the chapter. These solutions are also useful for completing homework assignments and preparing for tests.
Study NCERT Solutions in english
These solutions are available in english medium so that students can easily understand the concepts in their preferred language. Whether students are studying in Hindi medium or English medium, these solutions help them learn the subject more effectively and prepare confidently for examinations.
By practicing questions from Class 10 science Chapter 11. Human Eye and Colourful World Topic Exercise, students can strengthen their conceptual understanding and improve their problem-solving skills.
Conclusion
In conclusion, NCERT Solutions for Class 10 science Chapter 11. Human Eye and Colourful World Topic Exercise provide complete guidance for students who want to understand the chapter thoroughly. These solutions make learning easier, help students revise important concepts and improve their exam performance. Students should practice these answers regularly to build strong fundamentals and achieve better results in their examinations.
11. Human Eye and Colourful World-Exercise Science Class 10 In English
Hindi Medium Students/Teachers/Tutors:
All Chapters science Class 10
Class Wise NCERT Solutions
Students can find NCERT Solutions for Class 6, Class 7, Class 8, Class 9, Class 10, Class 11, and Class 12 on this page. Each class includes detailed solutions for important subjects such as Science, Mathematics, Social Science, English, and Hindi. These solutions are carefully prepared to ensure accuracy and clarity.
- NCERT Solutions for Classes 6 to 8 – Ideal for building strong basic concepts.
- NCERT Solutions for Classes 9 and 10 – Helpful for board exam preparation.
- NCERT Solutions for Classes 11 and 12 – Important for advanced concepts and competitive exams.
11. Human Eye and Colourful World-Exercise Science Class 10 In English Study Materials For Class 6 to 12
Benefits of Studying with NCERT Solutions
Using online NCERT Solutions makes learning easier and more convenient. Students can access the study material anytime and anywhere using their mobile phone, tablet, or computer. This flexibility helps students manage their study time more efficiently and prepare better for exams.
- Easy online access anytime and anywhere.
- Time-saving preparation with ready solutions.
- Better practice with accurate answers.
- Effective revision before exams.
Improve Your Learning with NCERT Solutions
Regular practice with NCERT textbook solutions helps students strengthen their understanding of each subject. These solutions not only help students complete their homework but also improve their analytical and problem-solving skills. By studying chapter-wise answers, students can learn the correct way to write answers in exams and score better marks.
If you want to improve your academic performance, start studying with free NCERT Solutions for all classes. These solutions are designed to make learning simple, clear, and effective for every student. Choose your class, explore the chapters, and begin your preparation with the latest NCERT Solutions today.