300 000 kilometres per second, The speed of light, reflection, Bouncing back; wave strikes a surface and changes direction in the same medium, electromagnetic spectrum, Range of waves including UV, light & radio waves, normal, Imaginary line perpendicular (90 degrees) to a surface, medium, Substance that a wave travels through e.g. air, water, incident ray, Direction a wave travels towards a boundary, reflected ray, Direction a wave travels after it has been bounced off a surface, angle of incidence, Angle between the incidence ray and the normal, angle of reflection, Angle between the reflected and the normal, Law of Reflection, Angle of incidence = angle of reflection.

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