Q. A person cannot see properly beyond 2 m. Power of the lens is
A) 0.5 D
B) 1.5 D
C) -2.5 D
D) -0.5 D
Explanation
(d) Focal length of eye lens $= \ - 2\ m$
So , power of lens = $\frac{1}{f} = \frac{1}{- 2}$
= -0.5 D (short-sighted)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.