Question

When objects at different distances are seen by the eye which of the following remains constant

1) Focal length of eye lens

2) Object distance from eye-lens

3) Radii of curvature of eye lens

4) Image distance from eye-lens

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Answer 1

Answer:

$\underline{\huge{Answer:-}}$

In the eye, image is always formed at retina which is at a fixed distance in eye. So, when objects at different distances are seen by the eye, the image distance from the eye lens remains constant by changing radii of curative of the eye lens leading to change in focal length.

Answer 2

Question ⤵️

When objects at different distances are seen by the eye which of the following remains constant

1) Focal length of eye lens

2) Object distance from eye-lens

3) Radii of curvature of eye lens

4) Image distance from eye-lens

Answer ⤵️

Option 2( object distance from eye-lens) is the correct answer.

Explanation ⤵️

In the eye, image is always formed at retina which is at a fixed distance in eye. So, when objects at different distances are seen by the eye, the image distance from the eye lens remains constant by changing radii of curative of the eye lens leading to change in focal length. As objects are at different distances, object distance from eye lens changes.