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Waves
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- 1Mechanical WavesNeed a material medium to travel through: Gas, liquid or solid. E.g. water waves, sound waves, seismic waves. Longitudinal or transverse.
- 2Transverse WavesMoves at right angles to the direction of the motion. Ripples on a pond.
- 3Longitudinal WavesMoves in the same direction as the motion of the wave. E.g. Sound Waves
- 4WavelengthDistance between 2 corresponding points of a wave. One crest to another crest.
- 5AmplitudeMaximum displacement of a part of the medium from its rest position.
- 6PeriodTime to complete one cycle of the waveform. Period = 1/Frequency (s)
- 7FrequencyThe number of cycles of the waveform per second. Frequency = 1/Period (f)
- 8Wave Speed (m/s)Frequency x wavelength
- 9DiffractionSpreading of waves as they pass by edges of obstacles.
- 10Electromagnetic WavesCan travel through a vacuum. Do not need matter like mechanical waves. Transverse changes. All travel at the same speed through a vacuum. 300 000 000 m/s. Higher frequency = short wavelength as speed = frequency x wavelength. As you go down the spectrum the frequency increases, but the wavelength decreases.
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- GCSE Chemistry Fichas sobre Waves, creado por Dominic Cherry el 03/04/2016.
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- Dominic Cherry
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