Hence on immersing the lens in the liquid, it behaves as a converging lens of focal length 
.
A substance is behaving as convex lens in air and concave in water, then its refractive index is
Text Solution
Verified by ExpertsC
A lens behaves as converging (convex) when its refractive index is greater than the surrounding medium, and as diverging (concave) when its refractive index is less than that of the surrounding medium.
So here:
• In air, lens acts as convex, 
refractive index of lens 
refractive index of air 
• In water, lens acts as concave, 
refractive index of lens < refractive index of water ( 
)
Hence the refractive index of the lens lies between air and water:
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems