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NCERT Solutions for Class 10 Science Chapter 10 – The Human Eye and the Colourful World
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Chapter 10 – The Human Eye and the Colourful World
Intext Questions with Solutions of Class 10 Science Chapter 10 – The Human Eye and the Colourful World
1.
Ans: The eye lens thins when the ciliary muscles are relaxed. As a result, the focal length increases and the eyes can clearly see far-off objects.
The ciliary muscles contract to make the eye lens thicker so that the surrounding things can be seen clearly. As a result, the eye lens’s focus length is shortened, allowing the eyes to see the surrounding things.
As a result, the human eye lens may change the focus length to perceive objects on the retina that are close and far away. The eye’s capacity for accommodation is referred to as this ability.
2.
Ans: A concave lens with a focal length of 1.2 meters should be utilized by an individual who has a myopic eye in order to restore the individual’s desired level of vision.
3.
Ans: The near point of the eye is the smallest distance at which an item can be clearly perceived without effort. It is 25 cm from the eye of a normal individual.
The farthest the eye can see objects clearly is known as the far point of the eye. A normal person’s eye has a distant point of infinity.
4.
Ans: A student struggles to read the chalkboard from the final row. It signifies that he is unable of perceiving distant objects with clarity.
The student is experiencing myopia. This aberration can be rectified with a concave lens.
Exercise Questions with Solutions of Class 10 Science Chapter 10 – The Human Eye and the Colourful World
1.
Ans: (b) Accommodation
2.
Ans: (d) Retina
3.
Ans: (c) 25 cm
4.
Ans: (c) Ciliary muscles
5.
Ans:
6.
Ans: Specifically, the individual is experiencing myopia. Within this deficiency, the picture is produced in front of the retina rather than behind it. For this reason, a concave lens is utilized in order to rectify this impairment in eyesight.
7.
Ans:
- The near point N of a hypermetropic eye is located at a greater distance than that of a normal near point N.
- In a hypermetropic eye, the image of a nearby object located at the normal near point N (25 cm) is formed posterior to the retina.
- Correction of hypermetropia: A convex lens creates a virtual image of an object positioned at the normal near point N, located at the near point N’ of the eye.
8.
Ans: The typical human eye struggles to perceive objects positioned closer than 25 cm with clarity, as the ciliary muscles reach their contraction limit beyond this distance.
9.
Ans: The image distance remains constant since the size of the eyes cannot change.
When the object’s distance from the eye increases, the image distance in the eye remains constant.
The increase in object distance is offset by a change in the focal length of the eye lens. The focus length of the eye fluctuates such that the image is always generated on the retina.
10.
Ans: Atmospheric refraction makes stars look like they are twinkling. Light from stars bends and bends again as it travels through the Earth’s atmosphere until it reaches the surface. Stars are really far away. So, they are the only source of light. The path of light from stars changes all the time, which is why the stars seem to move and the light from them continually sparkling. This is what makes a star look bright sometimes and faint sometimes, which is what twinkling is.
11.
Ans: The planets can be regarded as a major source of light because they are significantly closer to the earth than stars. The average change in the amount of light entering the eye from all point size light sources is zero if a planet is thought of as a collection of a very large number of point sources of light. As a result, the sparkling effect is eliminated.
12.
Ans: For an astronaut, the sky appears dark rather than blue because there is no atmosphere in deep space that might scatter sunlight.
Because sunlight does not scatter in space, astronauts do not see any scattered light, thus the sky appears black to them rather than blue.
Related Study Resources of Chapter 10 – The Human Eye and the Colourful World
Students can use the links below to get extra study materials for Class 10 Science Chapter 10: The Human Eye and the Colourful World.
| Sl No. | Related Links |
|---|---|
| 1 | Class 10 Science Chapter 10 The Human Eye and the Colourful World – Important Questions |
| 2 | Class 10 Science Chapter 10 NCERT Textbook |
Download The Human Eye and the Colourful World NCERT Solutions PDF
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Class 10 Science Chapter 10 Overview
The chapter “The Human Eye and the Colorful World” makes a stunning connection between science and the amazing things we see every day. It helps kids learn about the human eye, how we see colors, and why natural events like rainbows and the blue sky happen. Our NCERT Solutions for The Human Eye and the Colourful World explain these interesting themes in simple terms, which helps students connect what they learn in school to what they see in the real world.
Many students have trouble understanding how the eye works, how adaptation works, or why light bends in different atmospheres. Our step-by-step answers make these topics clearer by using simple explanations, labeled pictures, and real-life examples. Because of this, even complicated things like light dispersion or scattering are easier and more reasonable to learn.
The 2025 NCERT curriculum update has made this chapter shorter and more focused on concepts. It now puts more emphasis on how the eye works, how we see colors, and how things like making rainbows and stars twinkle happen in everyday life. Our The Human Eye and the Colourful World NCERT Solutions follow this new way of doing things very closely, so students may focus on what really important for tests.
Students not only learn how light behaves in nature by working through these problems, but they also get better at drawing diagrams and explaining things. The Human Eye and the Colorful World NCERT Solutions help you keep ideas fresh by going over them regularly. This makes studying for tests easier and more effective.
FAQs – Class 10 Science Chapter 10
Students often get confused since it integrates biology and physics. Our solutions make both portions easier to understand by presenting clear examples.
Our solutions include labeled graphics that are clear, accurate, and made to seem like the board test.
We use things that happen in the actual world, including sunrises, sunsets, and mirages, to help people understand refraction.
Each problem is broken down into steps so that students may clearly understand both the idea and the solution.
Our answers give straightforward, conceptual explanations with pictures to help you remember these things.
Yes! Every diagram is clearly labeled and set up to get full scores on board exams.