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The change in focal length of an eye len...

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

Text Solution

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ciliary muscles
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ZEN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-QUESTIONS SECTION (TEXTUAL EXERCISE :)
  1. The human eye forms the image of an object at its

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

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  3. The change in focal length of an eye lens is caused by the action of t...

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  4. A person needs a lens of power -5.5 dioptres for correcting his distan...

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  5. The far point of a myopic person is 80 cm in front of the eye. What is...

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  6. Make a diagram to show how hypermetropia is corrected. The near point ...

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  7. Why is a normal eye not able to see clearly the objects placed closer ...

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  8. What happens to the image distance in the eye when we increase the dis...

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  9. What causes twinkling of stars ?

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  10. Explain why the planets do not twinkle?

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  11. Why does the Sun appear reddish early in the morning ?

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  12. Why does the sky appear dark instead of blue to an astronaut ?

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  13. The human eye can focus objects at different distance by adjusting the...

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  14. The human eye forms the image of an object at this

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  15. Define the least distance of distinct vision. What is its value ?

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  16. The change in focal length of an eye lens is caused by the action of t...

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  17. A person needs a lens of power -5.5 dioptres for correcting his distan...

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    |

  18. The far point of a myopic person is 80 cm in front of the eye. What is...

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    |

  19. Make a diagram to show how hypermetropia is corrected. The near point ...

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    |

  20. Why is a normal eye not able to see clearly the objects placed closer ...

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    |