Two thin similar convex glass pieces are joined together

Last updated: 6/8/2023

Two thin similar convex glass pieces are joined together front to front with its rear portion silvered such that a sharp image is formed 20 cm from the mirror When the air between the glass pieces is replaced by water w 4 3 then the image formed from the mirror is at a distance of A 8 cm C 6 cm B 10 cm D 12 cm