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What happens to the image distance in th...

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

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The image distance remains same, equal to the distance of the retina from the eye lens.
The change in object distance is compensated by the change in the focal length of the eye lens due to the action of ciliary muscles so that a clear image is formed on the retina.
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ZEN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-QUESTIONS SECTION (TEXTUAL EXERCISE :)
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  2. Why is a normal eye not able to see clearly the objects placed closer ...

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

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  5. Explain why the planets do not twinkle?

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

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

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

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

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

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

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

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

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

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

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

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  17. Why do stars twinkle?

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  18. Explain why the planets do not twinkle?

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

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

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