When objects at different distances are seen by the eye which of the following remain constant?
a) focal length of eye-lens b) object distance from eye-lens [ ]
c) the radii of curvature of eye-lens d) image distance from eye-lens
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focal length of eye lens.
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Answer:
correct option is d- image distance from eye ens.
Explanation:
When objects at different distances are seen by the eye, the eye lens adjust the focal length of the eye lens in such way that the image always fall on retina and the distance between eye lens and retina is fixed which is 2.5cm
This property of eye lens by which it adjust the focal length is called as accommodation of eye lens .
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