Question

Does focal length changes in concave and convex

Answer 1

yes focal length changes in concave and convex....

Answer 2

HELLO DEAR FRIEND

FOCAL LENGTH DOESN'T CHANGES IN CONCAVE LENS OR CONVEX LENS OF GLASS.

BUT FOCAL LENGTH CHANGES OF CONVEX LENS OF EYE WHICH IS MUSCULAR .

HOPE IT HELPS YOU DEAR FRIEND THANKS