Which statement about a thin converging lens is correct?
The focal length is the distance from the optical center of the lens to the principal focus.
A converging lens always forms a real image of a real object.
Any ray of light passing through the optical center of the lens is refracted through the principal focus.
The principal focus is the point where all refracted rays of light intersect.
56 exam-style questions on CIE IGCSE Physics 3.2.3a Converging and diverging lenses. Each one has a worked solution and a mark scheme showing where the marks go.