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what do progressive wave transfer
energy without transferring material
what is amplitude
A wave’s maximum displacement from the equilibrium position (units are m
what is frequency
The number of complete oscillations passing through a point per second, (units are Hz)
what is wavelength
The length of one whole oscillation (e.g. the distance between successive peaks/troughs) (units are m)
what is speed
Distance travelled by the wave per unit time, (units are m/s)
what is phase
The position of a certain point on a wave cycle, (units are radians, degrees or fractions of a cycle)
what is phase difference
How much a particle/wave lags behind another particle/wave, (units are radians, degrees or fractions of a cycle)
what is period
Time taken for one full oscillation, (units are s)
when are two points in phase
they are both at the same point of the wave cycle
when waves are in phase, what will have
same displacement and velocity
their phase difference will be a multiple of 360°
when are two points completely out of phase
they’re an odd integer of half cycles apart
what is the equation of speed of a wave
c = fλ
what is the equation of the frequency of a wave
f = 1/T
Note 
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