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प्रश्न
How are we able to see nearby and also the distant objects clearly?
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उत्तर
Eyes have the ability to adjust its focal length which is known as the power of accommodation and we can see nearby and also the distant objects clearly. Relaxation of muscles makes the lens thinner and its focal length increases to make us see the distant objects clearly. The contraction of ciliary muscles increases the curvature of the eye lens and makes the eye lens thicker. Consequently, the focal length of the eye lens decreases. This enables us to see nearby objects clearly.
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संबंधित प्रश्न
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What happens to the image distance in the eye when we increase the distance of an object from the eye?
Identify and explain concepts given in this diagram.
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A: Increasing the field of view
B: Bringing three-dimensional view
C: Developing the concept of distance/size
Then the correct option is/are
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The ability of the eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina is called:
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Give the reason for the following:
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Name the following:
Two types of adaptations.
Define the following term:
Adaptation
Differentiate between members of the following pair with reference to what is asked in the bracket.
Dark and light adaptation (pigments which will be regenerated).
The figures (A) and (B) given below are showing some kind of adjustment. Study the figures and answer the questions that follow.
| A |  |
 |
B |
- Identify the kinds of adjustments done in the figures (A) and (B).
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- The pigment which gets regenerated.
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