Two identical symmetric double convex lenses of focal length f are cut into two equal parts L₁, L₂ by AB plane and L₃, L₄ by XY plane as shown in figure respectively. The ratio of focal lengths of lenses L₁ and L₃ is

Optics: JEE Main 2025 Physics question

JEE Main 2025 · 29 Jan, Evening shift · Q41

JEE Main 202529 Jan, Evening shiftPhysicsMediumOptics190× since 2002

Two identical symmetric double convex lenses of focal length

f

are cut into two equal parts

L_1, L_2

by AB plane and

L_3, L_4

by XY plane as shown in figure respectively. The ratio of focal lengths of lenses

L_1

and

L_3