LENSES

THE IMAGE BUILDERS

MICROSCOPE

TELESCOPE

CAMERA

FILM PROJECTOR

SLIDE PROJECTOR

EYE

CONTACT LENSES

HAND LENS

LENSES

CONVEX (CONVERGING) LENS

CONCAVE (DIVERGING) LENS

THEY ARE PARTS OF SPHERES

LENSES CAN BE CONSIDERED AS A COMBINATION OF PRISMS

ANATOMY OF CONVEX LENS

FOR CONVEX LENSES

Optic centre-The geometric

centre of thelens

Optic centre-The geometriccentre of the

lens

Object beyond 2F

Object at 2F

Object between2F and F

FOR AN EXTENDED OBJECT