A compound microscope is designed with two symmetric biconvex lenses. The objective lens is cut vertically, creating two…

A compound microscope is designed with two symmetric biconvex lenses. The objective lens is cut vertically, creating two identical plano-convex lenses. One of them is used in place of original objective lens. To retain same magnification keeping the object distance unchanged, the tube length has to be:

[JEE Main 2026, 5 Apr (Shift 1)]