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CBSE-XI-Physics

19: Optical Instruments

with Solutions -
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  • #2
    The muscles of a normal eye are least strained when the eye is focussed on an object
    (a) far away from the eye
    (b) very close to the eye
    (c) at about 25 cm from the eye
    (d) at about 1 m from the eye
    digAnsr:   a
    Ans : (a) far away from the eye
    A normal eye can see from 25 cm to infinity; it faces least difficulty and strain focussing on the object as far as it could be.
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