Rules to Form image by Convex Lens

1. A ray of light coming parallel to the Principal Axis, after refraction through the lens it will pass through the Principal Focus (F).
2. A ray of light passing through the Optical Centre (O) of the lens, after refraction it will continue its path without suffering any bend.
3. A ray of light coming from the Principal Focus (F), after refraction it will become parallel to Principal Axis.