Optics Question 648
Question: A double convex lens of glass of m = 1.5 has radius of curvature of each of its surface is 0.2 m. The power of the lens is
[JIPMER 1999]
Options:
A) + 10 dioptres
B) - 10 dioptres
C) - 5 dioptres
D) +5 dioptres
Show Answer
Answer:
Correct Answer: D
Solution:
$ f=\frac{R}{2(\mu -1)} $
$ \Rightarrow P=\frac{2(\mu -1)}{R}=\frac{2(1.5-1)}{0.2}=+5D $
