This PowerPoint has been designed as a lecture for teachers to use when introducing light, prisms and mirrors to a class with limited to no prior knowledge. The PowerPoint's colour-coded words, images, symbols and animations allow the teacher to explain: names of different beams of light (reflected ray, incident ray, refracted ray and emergent ray), the normal, names of angles (angle of incident, reflection, refraction and emergence), optical density, types of reflection (diffuse and specular re