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Human Eye and Colourful world

Telangana Board · Class 10 · Physical Sciences

Quick revision notes for Human Eye and Colourful world — Telangana Board Class 10 Physical Sciences. Key concepts, formulas, and definitions for last-minute revision.

43 questions40 flashcards5 concepts

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Key Topics to Revise

1

1. Least Distance of Distinct Vision and Angle of Vision

  • Least distance of distinct vision is the minimum distance at which an object can be seen clearly without strain.
  • For a healthy adult, this distance is about 25 cm.
  • At a young age, below 10 years, this distance can be as close as 7 to 8 cm.
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2. Structure and Working of the Human Eye

  • The eye ball is nearly spherical.
  • The front portion is sharply curved and covered by a transparent protective membrane called cornea.
  • Aqueous humour fills the space behind the cornea.
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3. Accommodation and Focal Length of Eye Lens

  • Accommodation is the process of adjusting focal length by the eye lens.
  • When the eye focuses on a distant object, ciliary muscles relax.
  • In that case, focal length is maximum and equal to the distance from lens to retina.
4

4. Defects of Vision and Their Correction

  • The eye may lose accommodation ability, causing blurred vision.
  • The three common defects are myopia, hypermetropia, and presbyopia.
  • Myopia is near sightedness.

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Full Notes

Key Concepts

The eye ball is nearly sphericalA healthy adult sees objects comfortablyThe angle formed by rays fromAccommodation is the ability ofThe eye lens forms a real

Frequently Asked Questions

What are the important topics in Human Eye and Colourful world for Telangana Board Class 10 Physical Sciences?
Human Eye and Colourful world covers several key topics that are frequently asked in Telangana Board Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Human Eye and Colourful world — Telangana Board Class 10 Physical Sciences?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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