A piano convex lens fits exactly into a piano concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices μ1 and μ2 and R is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is

see full answer

Want to Fund your own JEE / NEET / Foundation preparation ??

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*

An Intiative by Sri Chaitanya

Rμ1−μ2

2Rμ2−μ1

R2μ1+μ2

R2μ1−μ2

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The combination of two lenses 1 and 2 is as shown in figure.∴ 1f=1f1+1f2According to lens maker's formula1f1=μ1−11∞−1R=μ1−1R 1f2=μ2−11−R−1∞ =μ2−1−1R=−μ2−1R ∴ 1f=μ1−1R−μ2−1R 1f=μ1−μ2R f=Rμ1−μ2

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

Get Expert Academic Guidance – Connect with a Counselor Today!

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET