A quality-control system uses one thin lens to project a magnified silhouette of a small metal component onto a screen.
Which lens arrangement should be used?
a diverging lens with the component two focal lengths from the lens
a converging lens with the component at the principal focus
a converging lens with the component between one and two focal lengths from the lens
a converging lens with the component two focal lengths from the lens
93 exam-style questions on Edexcel GCSE Physics 5.1 Reflection, refraction and lenses, covering 5.1.1 Reflection, refraction and total internal reflection, 5.1.2 Specular and diffuse reflection, 5.1.3 Colour of light: absorption and filters, 5.1.4 Lenses: power, focal length and shape, 5.1.5 Ray diagrams for converging and diverging lenses, and 5.1.6 Real and virtual images. Each one has a worked solution and a mark scheme showing where the marks go.