Optics Question 627
Question: A concave lens of glass, refractive index 1.5, has both surfaces of same radius of curvature R. On immersion in a medium of refractive index 1.75, it will behave as a
[IIT-JEE 1999]
Options:
A) Convergent lens of focal length 3.5 R
B) Convergent lens of focal length 3.0 R
C) Divergent lens of focal length 3.5 R
D) Divergent lens of focal length 3.0 R
Show Answer
Answer:
Correct Answer: A
Solution:
Hence on immersing the lens in the liquid, it behaves as a converging lens of focal length 3.5 R.
