A person can see clearly upto 1m. Find the nature and power of the lens which will enable him to see things at a distance of 3m.

A person can see clearly upto 1m. Find the nature and power of the len

1.	A person can see clearly upto 1m. Find the nature and power of the lens which will enable him to see things at a distance of 3m.
Answer» CONCAVE `-0.66D` CONVEX `-0.66D` concave `-0.33D` convex`-0.33D` ANSWER :A