ScienceClass 10CBSE
Q
1. A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power (a) + 0.5 D (b) – 0.5 D (c) + 0.2 D (d) – 0.2 D
A
Soln:
Answer is (b) – 0.5 D
Explanation:
The person is Myopic and he need a concave mirror hence the power would be in negative. P= 1= 1 = 0.5 D