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NCERT solutions for Class 10 Science chapter 11 - The Human Eye and the Colourful World

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NCERT Science Class 10

Science Textbook for Class 10 - Shaalaa.com

Chapter 11: The Human Eye and the Colourful World

Chapter 11: The Human Eye and the Colourful World solutions [Page 190]

Q 1 | Page 190

What is meant by power of accommodation of the eye?

Q 2 | Page 190

A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?

Q 3 | Page 190

What is the far point and near point of the human eye with normal vision?

Q 4 | Page 190

A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected?

Chapter 11: The Human Eye and the Colourful World solutions [Pages 197 - 198]

Q 1 | Page 197

The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to

  • presbyopia

  • accommodation

  • near-sightedness

  • far-sightedness

Q 2 | Page 198

The human eye forms the image of an object at its:

  • cornea

  • iris

  • pupil

  • retina

Q 3 | Page 198

The least distance of distinct vision for a young adult with normal vision is about

  • 25m

  • 2.5cm

  • 25cm

  • 2.5m

Q 4 | Page 198

The change in focal length of an eye-lens is caused by the action of the:

  • pupil

  • retina

  • ciliary muscles

  • iris

Q 5 | Page 198

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?

Q 6 | Page 198

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?

Q 7 | Page 198

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.

Q 8 | Page 198

Why is a normal eye not able to see clearly the objects placed closer than 25 cm?

Q 9 | Page 198

What happens to the image distance in the eye when we increase the distance of an object from the eye?

Q 10 | Page 198

 Why do stars twinkle on a clear night?

Q 11 | Page 198

Explain why the planets do not twinkle?

Q 12 | Page 198

Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an observer on the moon? Justify your answer with a reason.

Q 13 | Page 198

Why does the sky appear dark (or black) to an astronaut instead of blue?

Chapter 11: The Human Eye and the Colourful World

NCERT Science Class 10

Science Textbook for Class 10 - Shaalaa.com

NCERT solutions for Class 10 Science chapter 11 - The Human Eye and the Colourful World

NCERT solutions for Class 10 Science chapter 11 (The Human Eye and the Colourful World) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Science Textbook for Class 10 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com are providing such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 10 Science chapter 11 The Human Eye and the Colourful World are Spherical Mirrors, Image Formation by Spherical Mirrors - Concave Mirror, Representation of Images Formed by Spherical Mirrors Using Ray Diagrams - Concave Mirror, Sign Convention for Reflection by Spherical Mirrors, Mirror Formula and Magnification, Velocity of Light, Refraction Through a Rectangular Glass Slab, Refractive Index, Refraction by Spherical Lenses, Image Formation by Lenses - Convex Lens, Image Formation in Lenses Using Ray Diagrams - Convex Lens, Sign Convention for Spherical Lenses, Lens Formula and Magnification, Introduction, Image Formation by Spherical Mirrors - Convex Mirror, Representation of Images Formed by Spherical Mirrors Using Ray Diagrams - Convex Mirror, Image Formation by Lenses - Concave Lens, Image Formation in Lenses Using Ray Diagrams - Concave Lens, Light Reflection and Refraction Introduction, Power of a Lens, Concept of Human Eye, Defects of Vision and Their Correction, Applications of Spherical Mirrors and Lenses, Dispersion by a Prism, Atmospheric Refraction, Some Natural Phenomena Due to Sunlight.

Using NCERT Class 10 solutions The Human Eye and the Colourful World exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 10 prefer NCERT Textbook Solutions to score more in exam.

Get the free view of chapter 11 The Human Eye and the Colourful World Class 10 extra questions for Science and can use Shaalaa.com to keep it handy for your exam preparation

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