Question

17. A person is trying to read a newspaper by holding it very close to his eyes. But he finds the

image of page is somewhat blurred and feels a strain in his eyes.

(a) At what minimum distance from the eyes should the newspaper be held so that it can be

read distinctly and without strain? What is this distance called?

(b) What do you mean by Range of vision for normal eye?

(c) What happens to the focal length of eye lens when the object is brought close to eye?​

Answer 1

Answer:

(A) The minimum distance from the eyes to read the newspaper without strain is 25 cm. It is  ]called least distance of distinct vision or near point of the eye.

(B) Range of vision of a normal human eye is the range of distance for which human eye can see an object clearly.

(C) The focal length of the eye lens decreases .

Explanation: