Question

What should be the image distance of the image formed by the eye lens irrespective of the position of the object kept beyond the near point of a normal eye ??
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Answer 1

Answer:

the distance of all images with respect to eye ball must be 2.5 cm for the objects placed beyond near point of normal eye.

Explanation:

As we know that all the objects which are placed beyond the near point of the normal eye we can see the image clearly for them.

This is due to the self adjustment of the focal length of the eye lens. Eye lens adjust its focal length and we always obtain the image on the retina of the eye.

So as per construction of eye we know that retina of the eye exist exactly opposite to the eye lens at diametrical opposite position.

So the distance of all images from eye lens is same as that of diameter of eye ball

For normal eye the diameter of eye ball is approximately 2.5 cm

So the distance of all images with respect to eye ball must be 2.5 cm for the objects placed beyond near point of normal eye.

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Topic : Image formation by eye

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