Physics - Waves 0.0 / 5 ? PhysicsWavesA2/A-levelOCR Created by: jklos5899Created on: 11-10-19 11:54 Amplitude The maximum displacement of a wave from its rest position (m) 1 of 28 Diffraction When a wave spreads out after passing around an obstacle or through a gap 2 of 28 Coherence Two waves with a constant phase relationship 3 of 28 Displacement The distance a point on a wave is from its original position (m) 4 of 28 Wavelength The length of one whole wave cycle 5 of 28 Period The time taken for a whole cycle to complete 6 of 28 Frequency The number of cycles per second passing a given point 7 of 28 Phase A measurement of the position of a certain point along the wave cycle 8 of 28 Phase Difference The amount one wave lags behind another in radians 9 of 28 Intensity The rate of flow of energy per unit area at right angles to the direction of travel of the wave. 10 of 28 Reflection When a wave is bounced back after hitting a boundary 11 of 28 Refractive Index The ratio between the speed of light in a vacuum and the speed of light in a material 12 of 28 Stationary Wave The superposition of two progressive waves with the same wavelength moving in opposite directions. 13 of 28 Electronvolt The kinetic energy gained by an electron when it is accelerated through a potential difference of 1 volt. 14 of 28 Electromagnetic Wave A self propagating transverse wave that does not require a medium to travel through 15 of 28 Fundamental Frequency The lowest frequency in a harmonic series where a stationary wave forms 16 of 28 Harmonics Whole number multiples of the fundamental frequency of a stationary wave 17 of 28 Interference The addition of two or more waves that results in a new wave pattern 18 of 28 Longitudinal wave A wave where the oscillations are parallel to the direction of wave propagation 19 of 28 Nodes Points in a stationary wave at which there is no displacement of the particles at any time 20 of 28 Plane-Polarised Wave A transverse wave oscillating in only one plane 21 of 28 Polarisation The process of turning an unpolarised wave into a polarised wave 22 of 28 Progressive waves Waves that transfer energy away from a source 23 of 28 Refraction When waves change direction when they travel from one medium to another due to a difference in the wave speed in each medium 24 of 28 Spectrum A collection of waves with a range of frequencies 25 of 28 Stationary Wave A wave formed by the interference of two waves travelling in opposite directions 26 of 28 Transverse Wave A wave where the oscillations are perpendicular to the direction of wave propagation 27 of 28 Wave A series of vibrations that transfer energy from one place to another 28 of 28
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