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
A
Convergent lens of focal length 
B
Convergent lens of focal length 
C
Divergent lens of focal length 
D
Divergent lens of focal length 
Text Solution
Verified by ExpertsThe correct answer is:
A
By len's maker formula, we have
Hence on immersing the lens in the liquid, it behaves as a converging lens of focal length 
.
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
A convex refracting surface of radius of curvature 20cm separates two media of refractive indices …
Shown in the figure here is a convergent lens placed inside a cell filled with a liquid. The lens h…
A plano-convex lens when silvered in the plane side behaves like a concave mirror of focal length 3…
The power of a lens having refractive index 1.25 is +3D. When placed in a liquid its power is -2 D.…
When an object is at a distance x and from the optical center of a lens, a real and a virtual image…
A source of light is located at double focal length from a convergent lens. The focal length of the…