Two thin plano convex lenses each of focal length m in air

Last updated: 6/11/2023

Two thin plano convex lenses each of focal length m in air are placed at some distance d from each other as shown in the figure The space between the lenses are filled with a substance with refractive index The distance d between the lenses are so adjusted that a parallel beam of light passes through such an optical system remains parallel Take refractive index of lens Choose correct option A B If 4 1 2 d 90 cm d 100 cm H air