A-level Applied Science/Physics of Performance Effects/Light

You need to know about: • how light travels. • the intensity and amplitude of light. • the relationship between distance from a light source and intensity • the relationship between the frequency, wavelength and colour • the three primary colours of light, complementary colours and how they combine • the production of a spectrum from white light • lighting effects (silhouettes, shadows, lightning flashes, optical illusions, etc.) • lighting aids (footlights, floodlights, stroboscopes, dimmer boards, dimmer racks, slide projectors, data projectors, colour wheels, mirror balls, lasers, etc.) You need to measure: • the reflection of light by plane and curved surfaces. • the refraction of light by prisms and lenses. • the use of colour filters • reflection and absorption of light to colour objects