1) A group of transverse waves that all travel at the speed of light in a vacuum. a) Sea Waves b) Sound Waves c) Mexican Waves d) Electromagnetic Waves 2) The number of vibrations per second. The units are Hertz (Hz) a) Amplitude b) Speed c) Frequency d) Time Period 3) Reflection from a rough surface, where the reflected light is scattered. a) Diffuse Reflection  b) Rough Reflection c) Specular Reflection d) Smooth Reflection 4) Something that only transmits certain colours and absorbs the rest. a) Colour Wheel b) Filter c) Transparent d) Opaque 5) Giving off light. The Sun and light bulbs are luminous objects. a) Luminous b) Reflective c) Opaque d) Refractive 6) Light is reflected evenly, so that all light rays reflect in a parallel direction. a) Internal Reflection b) Diffuse Reflection c) Paraflection d) Specular Reflection 7) Electromagnetic waves that can be detected by the human eye. a) Ultra-violet b) Visible Light c) Infra-red d) X-rays 8) The seven colours that make up white light. ROYGBIV a) Septrum b) Electromagnetic Spectrum c) Visible Spectrum d) Rainbow 9) Normal daylight, or the light from light bulbs, made up of ROYGBIV. a) Black Light b) Infra red c) White Light d) Heat 10) When white light passes through a prism the colours in white light separate. a) Refraction b) Specular Reflection c) Rainbow d) Dispersion

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