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Q.

Is it true that the normal eye is not able to see clearly objects placed closer than 25 cm?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is True.
A normal eye cannot see objects nearer than 25 cm because the eye cannot lower the focal length beyond a limit since ciliary muscles are maximumly strained, i.e., beyond that, they do not strain. This is due to the ciliary muscles of the eye being unable to contract past a certain point. If the thing is situated less than 25 cm from the eye, the object seems fuzzy because light rays from the object collide beyond the retina.
 
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