A plano-convex lens (focal length f₂, refractive index μ ₂, radius of curvature R) fits exactly into a plano-concave lens (focal length f₁, refractive index μ ₁, radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be:

Optics: JEE Main 2019 Physics question

JEE Main 2019 · 12 Jan, Evening shift · Q7035

JEE Main 201912 Jan, Evening shiftPhysicsMediumOptics190× since 2002

A plano-convex lens (focal length f₂, refractive index

\mu

₂, radius of curvature R) fits exactly into a plano-concave lens (focal length f₁, refractive index

\mu

₁, radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be :

JEE Main 2019 Optics Question with Solution (12 Jan Evening shift, Q7035) | JEE Arc

JEE Main 2019 · 12 Jan, Evening shift · Q7035

JEE Main 201912 Jan, Evening shiftPhysicsMediumOptics190× since 2002

A plano-convex lens (focal length f₂, refractive index

\mu

₂, radius of curvature R) fits exactly into a plano-concave lens (focal length f₁, refractive index

\mu

₁, radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be :