Optics Question 629
Question: A double convex lens is made of glass of refractive index 1.5. If its focal length is 30 cm, then radius of curvature of each of its curved surface is
[Bihar CEET 1995]
Options:
A) 10 cm
B) 15 cm
C) 18 cm
D) None of these
Show Answer
Answer:
Correct Answer: D
Solution:
$ f=\frac{R}{2(\mu -1)}\Rightarrow 30=\frac{R}{2(1.5-1)}\Rightarrow R=30 $ $ cm $
