Peak - The highest point of a wave, Amplitude - The height of a wave from the midpoint, Wavelength - The length of one complete wave, Frequency - Number of waves per second, Hertz - Unit of frequency, Metre - Unit of wavelength, Transverse - Type of wave that oscillates at 90° to direction of travel, Longitudinal - Type of wave that oscillates parallel to direction of travel, Sound - An example of a longitudinal wave, Radio wave - Electromagnetic wave with the longest wavelengths, Gamma ray - Electromagnetic wave with the highest frequency and shortest wavelength, Microwaves - Electromagnetic radiation used to heat food, Retina - Part of the eye which can detect visible light, Infrared - Electromagnetic radiation which we feel as heat, Fluorescent - ________ dyes - used in banknotes, detector of UV radiation, Ultra violet - Band of the electromagnetic spectrum, UV for short, Photographic film - A detector of X-rays and visible light, Vacuum - Light can travel through this but sound cannot, convex - Type of lens which brings light to a focus, concave - Type of lens which spreads light rays apart, Refraction - Bending of light as it enters a different medium, Normal - Imaginary line at right angles to the surface of a medium, Slows down - Light does this when it enters a more dense medium, Speeds up - Light does this when it enters a less dense medium, Angle of incidence - Angle between normal and ray before refraction, Angle of refraction - Angle between normal and ray after refraction,

N4 Waves

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