Chapter 11
Light
Ray diagrams show where light travels and help explain where an image appears.
Use the ray path, angles and image evidence to explain an optical situation.
Includes reflection, refraction, converging lenses and interpretation of supplied image diagrams. For K326 / K327 (2027) / 5086 / 5087 (2026).
Choose a topic
Reflection and plane mirrors
Measure angles from a normal and locate a plane-mirror image using reflected rays.
Refraction and refractive index
Trace light across boundaries and calculate angles and speed using the stated media.
Converging action and focal length
Identify a principal focus and measure focal length from the lens centre.
Real and virtual images
Interpret supplied diagrams and observations to describe image size, orientation and screen formation.