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3.1.1 Progressive Waves
Your notes
Properties of Oscillations
A progressive wave is defined as:
A wave that transfers energy from one point to another without transferring the medium
itself
Properties of a Progressive Wave
Displacement (x) of a wave is the distance of a point on the wave from its equilibrium position
It is a vector quantity; it can be positive or negative
Amplitude (A) is the maximum displacement of a particle in the wave from its equilibrium position
Wavelength (λ) is the distance between points on successive oscillations of the wave that are in phase
These are all measured in metres (m)
Diagram showing the amplitude and wavelength of a wave
Period (T) or time period, is the time taken for one complete oscillation or cycle of the wave
Measured in seconds (s)
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Your notes
Diagram showing the time period of a wave
Frequency (f) is the number of complete oscillations per unit time. Measured in Hertz (Hz) or s-1
Frequency-period equation
Speed (v) is the distance travelled by the wave per unit time
Measured in metres per second (m s-1)
The wave equation links the speed, frequency and wavelength of a wave
This is relevant for both transverse and longitudinal waves
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