What is long-sightedness? State the two causes of long-sightedness (or hypermetropia). With the help of ray diagrams, show: (i) the eye-defect long-sightedness. (ii) correction of long-sightedness by using a lens.

Question

Philoid · Accepted Answer

The defect of vision due to which a person cannot see the nearby objects clearly but he can see the distant objects clearly is known as long-sightedness.

The two causes of long-sightedness are:-

1) Focal length of the eye lens is too long.

2) The eyeball has become too small.

(i) The ray diagram is:-

(ii) The 3^rd diagram shows the correction of long-sightedness by using a lens.

What is long-sightedness? State the two causes of long-sightedness (or hypermetropia). With the help of ray diagrams, show:(i) the eye-defect long-sightedness.(ii) correction of long-sightedness by using a lens.

What is long-sightedness? State the two causes of long-sightedness (or hypermetropia). With the help of ray diagrams, show:
(i) the eye-defect long-sightedness.

(ii) correction of long-sightedness by using a lens.