Which statement about a diverging (concave) lens is not correct?
Rays parallel to the principal axis are refracted so that they appear to diverge from the principal focus.
A ray passing through the center of the lens is refracted through the principal focus.
The distance between the optical center of the lens and the principal focus is the focal length.
The principal focus is a point on the principal axis from which the refracted parallel rays appear to originate.
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.