Question

Which of the following statements are true about the lenses used in eyeglasses to correct nearsightedness and farsightedness? (There may be more than one correct choice.)A: They produce a real image.B: They produce a virtual image.C: Both nearsightedness and farsightedness are corrected with a converging lens.D: Both nearsightedness and farsightedness are corrected with a diverging lens

Answer 1

Answer:

A: They produce a real image.

Explanation:

The images formed on the retina of the eye for a normal visibility must always be real.

Only a real image can be physically projected on any physical object whereas the virtual images are visible due to reflections.

• The nearsightedness is corrected with the help of a concave lens since it is the condition of the eye lens remaining thick and curved to converge the rays entering the eyes after a shorter distance which results in their image formation even before the retinal surface so to initially diverge them a bit so that they converge on the retinal surface and form the image there we use concave lens. Vice-versa of the above justification in  the case of farsightedness.