If we bring an object closer than 25 cm from the eyes, why can we not see it clearly even though it subtends a bigger angel at the eye?
Answers
Answer:
A normal eye is unable to clearly see the objects placed closer than 25 cm because the ciliary muscles of eyes are unable to contract beyond a certain limit
Explanation:
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Answer:
normal eye is unable to clearly see the objects placed closer than 25 cm because the ciliary muscles of eyes are unable to contract beyond a certain limit.
Explanation
A normal eye cannot see clearly the objects that are placed closer than 25cm because the power of accommodation of the eye is 25cm which is exhausted. When the maximum accommodation of the eye is reached, the ciliary muscles of the eye lens cannot become thicker.
Power of accommodation
The process by which certain muscles (called ciliary muscles) function, to change the focal length of the eyes so that the image is clearly formed on the retina is called the accommodation of the eye. This will vary for near and distant objects and also for objects moving away or towards the eye. The ability of the eye lens to adjust its focal length, so as to clearly focus rays coming from distant as well a near object on the retina, is called the power of accommodation of the eye.
The power of accommodation of a human eye is 25cm.
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