amplification - this give a signal more energy, diffraction - the spreading out of waves when they pass through a gap of a similar size to the wavelength, frequency - the number of oscillations per second made by a vibrating object, ionosphere - a region of the atmosphere (about 100–500 km high) where molecules have been ionised by radiation from the Sun, refraction - the change in speed of waves on moving from one medium to another of different density, microwaves - electromagnetic waves with a wavelength of a few centimetres, total internal reflection - when waves move to a less dense medium, at a suitably large angle of incidence, all the wave is reflected at the boundary, with none being refracted, geostationary satellite - an artificial satellite that orbits Earth above the equator with a period of 24 hours, wavelength - the distance between two crests (or troughs) on a wave,

P5L14-KeywordMatchup

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