2021 · Q5
Which one of the following statements with regard to a short-sighted person is correct?
general-sciencephysics-light-electricity
- AA short-sighted person sees the near objects blurred but distant objects clearly and a convex lens is used to correct this defect.
- BA short-sighted person sees the near objects clearly but distant objects blurred and a concave lens is used to correct this defect.
- CA short-sighted person sees the near objects blurred but distant objects clearly and a concave lens is used to correct this defect.
- DA short-sighted person sees the near objects clearly but distant objects blurred and a convex lens is used to correct this defect.
Explanation
A short-sighted (myopic) person sees nearby objects clearly but distant objects appear blurred, because the image forms in front of the retina. The defect is corrected with a concave (diverging) lens, which spreads the light rays so the image falls on the retina. Statements A and C wrongly reverse the symptom, and D pairs the correct symptom with the wrong (convex) lens. Hence statement B is correct.