Question

Which one of the following lens is used to correct short

sightedness ?

A. Convex lens B. Plano Convex lens

C. Concave lens D. None of these​

Answer 1

To find:

Lens used to correct SHORT-SIGHTEDNESS ?

• Convex lens
• Plano convex lens
• Concave lens
• None of the above

Solution:

First of all, let's learn about Short-sightedness:

• It is otherwise called MYOPIA (or near-sightedness).

• Here the person can see the close objects closely , but cannot see the far objects.

• This is because the light rays from distant object meet the principal axis before the retina, because the power of eye lens increases.

Thats why the person needs to use CONCAVE LENS to correct this problem.

• Using this lens, the light rays will be diverted away, which will proportionately reach the retina.

• Hence the person will be able to see distant objects clearly.

$\star$ Hope It Helps