Q. 4

When objects at different distances are seen by the eye, which of the following remain constant?
A. The focal length of the eye-lens.

B. The object-distance from the eye-lens.

C. The radii of curvature of the eye-lens.

D. The image-distance from the eye-lens

Answer :

The actual image-distance from the eye-lens remains unchanged since the image is


formed on retina.


To view an object, the focal length of the eye-lens has to change and also , radii


of curvature of the eye-lens also changes. When the focal length changes, the object distance


also changes.

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