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.
216 exam-style questions on CIE IGCSE Physics 3.2 Light, covering 3.2.1a Reflection of light, 3.2.1b Images in a plane mirror, 3.2.2 Refraction of light, 3.2.2a Refraction of light, 3.2.2b Total internal reflection, 3.2.2c Refractive index and critical angle, 3.2.2d Optical fibres, 3.2.3a Converging and diverging lenses, 3.2.3b Ray diagrams and the nature of images, 3.2.3c Virtual images and the magnifying glass, 3.2.3d Correcting long-sightedness and short-sightedness, and 3.2.4 Dispersion of light. Each one has a worked solution and a mark scheme showing where the marks go.