Скачать или смотреть 2. The human eye forms the image of an object at its (a) cornea (b) iris (c) pupil (d) retina

2. The human eye forms the image of an object at its (a) cornea (b) iris (c) pupil (d) retina
2. मानव आँख किसी वस्तु का प्रतिबिम्ब बनाती है (a) कॉर्निया (b) आईरिस (c) पुतली (d) रेटिना
2. maanav aankh kisee vastu ka pratibimb banaatee hai (a) korniya (b) aaeeris (ch) putalee (d) retina

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Chapter 11 HUMAN EYE AND THE COLOURFUL WORLD
EXPLANATION OF NCERT EXERCISE QUESTIONS

PLAYLIST Chapterwise solution -    • Видео  
PLAYLIST of question answer -    • Видео  

In this session we will be starting with the chapter "metals and non metals?".
We will cover the In-between Question/Answers and exercise questions.
✔️ Class: 10th
✔️ Subject: Chemistry
✔️ Chapter 11: Human Eye and The Colourful World
CLASS 10th NCERT CHAPTER & EXERCISE QUESTION & ANSWER
अध्याय 11 मानव आँख और रंगीन दुनिया 10वीं एनसीईआरटी अध्याय और अभ्यास प्रश्न और उत्तर, एनसीईआरटी अभ्यास प्रश्नों की व्याख्या एनसीईआरटी अध्याय और अभ्यास प्रश्न और उत्तर कक्षा 10वीं एनसीईआरटी विज्ञान

adhyaay 11 maanav aankh aur rangeen duniya kaksha 10veen enaseeeeaaratee adhyaay aur abhyaas prashn aur uttar, enaseeeeaaratee abhyaas prashnon kee vyaakhya enaseeeeaaratee adhyaay aur abhyaas prashn aur uttar
kaksha 10veen enaseeeeaaratee vigyaan

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1. What is meant by power of accommodation of the eye?
2. 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?
3. What is the far point and near point of the human eye with normal vision?
4. 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?
1. 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
2. The human eye forms the image of an object at its
(a) cornea (b) iris
(c) pupil
(d) retina
3. 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
4. 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
5. 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?
6. 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?
7. 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.
8. Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
9. What happens to the image distance in the eye when we increase the distance of an object from the eye?
10. Why do stars twinkle?
11. Explain why the planets do not twinkle?
12. Why does the Sun appear reddish early in the morning?
13. Why does the sky appear dark instead of blue to an astronaut?