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Waves

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1WavesTransfer energy from one place to another without transferring matter
2FrequencyNumber of complete passing a point per second
Measured in hertz (Hz)
Workout the period of a wave (amount of time it takes a full cycle of the wave)
1
T(s) = ———
f (Hz)
3Transverse wavesVibrations are at a 90* to the direction of energy transfer
All electromagnetic waves
Ripple and waves in water
A wave on a spring
4Longitudinal wavesVibrations move in the same direction as the energy transfer
5Wave speed formulaWave speed (m/s) = frequency (Hz)
X
Wavelength (m)
6Ripple tank experiment1.Use signal generator attached to dipper of ripple tank you can create water waves at set frequency
2.use lamp to see wave crest on the screen below tank
3.distance between each shadow line is equal to one wave length. Measure distance between shadow lines that are 10 wavelengths, divide by 10 to find one wave length (average).
4.use the formula wave speed = frequency x wavelength
7Waves on a spring/string1. Set up equipment. Turn in signal generator and vibration transducer. Sting will start to vibrate.
2. Adjust frequency of signal generator until a clear wave appears.
3. Measure with a ruler the wavelength
4.frequency shown on signal generator
5. Use wave speed = frequency x wavelength