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(a) What happens to the size of pupil of...

(a) What happens to the size of pupil of our eye (i) in dim light (ii) in bright light ?
(b) Name the cells on the retina of an eye which are sensitive to (i) bright light (ii) dim light (iii) sensation of colour.

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The correct Answer is:
(i) Becomes large (ii) Becomes small (b) (i) Cones (ii) Rods (iii) Cones
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LAKHMIR SINGH & MANJIT KAUR-THE HUMAN EYE AND THE COLOURFUL WORLD -Exercise
  1. What are rods and cones in the retina of an eye ? Why is our night vis...

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

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

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

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

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

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

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

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  9. Refraction of light in the eye occurs at :

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  10. To focus the image of a nearby object on the retina of an eye :

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  11. The term "accommodation" as applied to the eye, refers to its ability ...

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  12. Which of the following controls the amount of light entering the eye ?

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  13. The human eye possesses the power of accommodation. This is the power ...

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  14. How does the eye change in order to focus on near or distant objects ?

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  15. Which of the following changes occur when you walk out of bright sunsh...

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  16. The size of the pupil of the eye is adjusted by :

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  17. What shape are your eye-lenses : (a) when you look at your hand ? ...

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  18. Suggest how your irises help to protect the retinas of your eyes from ...

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  19. (a) Which parts of the eye cause rays of light to converge on the reti...

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  20. An object is moved closer to an eye. What changes must take place in t...

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