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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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