A projector contains a thin converging lens, which has a principal focus on each side. A ray of light from the slide passes through the principal focus on the slide's side of the lens before it reaches the lens.
Which describes what happens to the ray after it has passed through the lens?
it travels parallel to the principal axis
it crosses the principal axis beyond the principal focus on the far side
it crosses the principal axis before the principal focus on the far side
it continues in its original direction without being refracted
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.