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What changes take place in the shape of ...

What changes take place in the shape of eye-lens :
(a) when the eye is focused on a near object ?
(b) when the eye is focused on a distant object ?

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The correct Answer is:
(a) Eye-lens becomes thicker (more convex) (b) Eye-lens becomes thinner (less convex)
NA
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LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Exercise
  1. Fill in the following blanks with suitable words : (a) Most of the r...

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  2. Why is normal eye not able to see clearly the objects placed closer th...

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  3. What changes take place in the shape of eye-lens : (a) when the eye ...

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  4. The eye of a person are focused (i) on a nearby object, and (ii) on a ...

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  5. What change is made in the eye to enable it to focus on objects situat...

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  6. How is the amount of light entering the eye controlled ?

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  7. What happens to the eye when you enter a darkened cinema hall from bri...

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  8. Why does it take some time to see objects in a dim room when you enter...

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  9. A person walking in a dark corridor enters into a brightly lit room : ...

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  10. Ciliary muscles of human eye can contract or relax. How does it help i...

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  11. Describe and explain, how a normal eye can see objects lying at variou...

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  12. There are two types of light-sensitive cells in the human eye : (a) ...

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  13. What are rods and cones in the retina of an eye ? Why is our night vis...

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  14. (a) How does the convex eye-lens differ from the ordinary convex lens ...

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  15. (a) What happens to the size of pupil of our eye (i) in dim light (ii)...

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  16. (a) Draw a simple diagram of the human eye and lebel clearly the corne...

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  17. What happens to the eye when you enter a darkened cinema hall from bri...

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  18. The human eye forms the image of an object at its

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  19. The change is focal length of an eye-lens is caused by the action of t...

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  20. The least distance of distinct vision for a young adult with normal vi...

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