A student can see nearby objects clearly but cannot see distant objects distinctly. Which lens should be used in his spectacles to correct this defect?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Concave lens
This defect is myopia (near-sightedness): the image of a distant object is formed in front of the retina. A concave lens of suitable power moves the image back onto the retina.