CP4 Key Words 0.0 / 5 ? PhysicsWavesGCSEEdexcel Created by: 11AalhussainCreated on: 13-06-21 07:08 What is Amplitude The size of vibrations or the maximum distance a particle moves away from its resting position when a wave passes 1 of 16 Electromagnetic Wave A group of waves that all travel at the same speed in a vacuum, and are all transverse 2 of 16 Frequency The number of vibtrations (or the number of waves) per second 3 of 16 hertz(Hz) The unit for frequency. One heryz is one wave per second 4 of 16 longitudinal wave A wave where the particles vibrate in the same direction as the wave is travelling 5 of 16 medium Any susbtance through which something travels 6 of 16 period The time taken for one complete wave to pass a point. It is measured in seconds 7 of 16 seismic waves Vibrations in the rocks of the Earth caused by earthquakes or explosions There are transverse and longitudinal seismic waves 8 of 16 sound waves Vibrations in the particles of a solid, liquid or gas, which are detected by our ears and 'heard' as sounds. Sound waves are longitudinal waves 9 of 16 transverse wave A wave where the vibrations are at right angles to the direction the wave is travelling 10 of 16 velocity The speed of an object in a particular direction. Usually measured in metres per second (m/s) 11 of 16 wave A wave of transferring energy or information. Many waves travel when particles pass on vibrations. 12 of 16 Wavelength The distance between a point on one wave and the same point on the next wave 13 of 16 Interface The boundary between two materials 14 of 16 Normal An imaginary line at right angles to a surface where a ray of light hits it 15 of 16 Refraction The change in direction when waves go from one medium to another 16 of 16
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