Question

in a myopia patient the distance isD is 50cm .what is the focal length of the concave lens

Answer 1

Explanation:

focal length of concave lens is negative 

Focal length of lens is −50cm=−0.5m 

 P=f1=−0.51=−2D

Since the focal length of lens is negative its myopic defect .Lens is diverging in nature.