MHT CET 2025 Physics question
A plano convex lens fits exactly in to a plano concave lens. Their plane surfaces are parallel to each other. Lenses are made up of different materials of refractive indices 'n' 'n' and 'R' is the radius of curvature of the curved surface of lenses. Focal length of the combination of lenses is
Answer: (D)
Solution
Because the plano-convex lens fits exactly into the plano-concave lens, both curved surfaces have the same radius . For the plano-convex lens (index ): . For the plano-concave lens (index ): $ = -
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account