A plano-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices 
and 
and R is the radius of curvature of the curved surface of the lenses, What is the focal length of combination?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Focal length of the combination 
…… .(i)
We have, 
and 
On putting these values in Eq. (i), we get
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 microscope is focused on a mark on a paper and then a slab of glass of thickness 3 cm and refract…
A short linear object of length b lies along the axis of a concave mirror of focal length f at a di…
If angle of incidence is twice the angle of refraction in a medium of refractive index µ, then angl…
Light travels in two media A and B with speeds and respectively. Then, the critical angle between…
A ray of light travelling in transparent medium of refractive index µ falls on a surface separating…
A combination of concave and convex lens in contact is placed over a plane mirror. When a pin P is …