Q. A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is
A) Equal to unity
B) Equal to 1.33
C) Between unity and 1.33
D) Greater than 1.33
Explanation
(c) $\mu_{air} < \mu_{lens} < \mu_{water}\ i.e.,\ 1 < \mu_{lens} < 1.33$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.