phase difference Flashcards
what is in phase
they have the same position or phase angle in their periodic cycle at the same moment in time.
what is antiphase
a difference of 180 degrees between the phase of two waves.
The phase of an oscillation can describe…
what stage a point is at in its oscillation.
how many oscillations, or how much of one oscillation, has been completed.
No matter where the oscillation begins an equilibrium position with the point moving upwards is always labelled as…
0 or 360
An equilibrium position with the point moving downwards is always labelled as…
180
A peak is always labelled as..
90
A trough is always labelled as…
270
what are the two reasons for phase
communicate the stage of ocillation
can be used mathematically
2 ways to find the phase difference
use the distance-time graph
use the starting points
what is phase difference
The relationship between two oscillating points
phase difference is the same for all parts if the two waves have
the same frequency
same wavelength
how to find phase difference using wavelength
find wavelength
find the distance between 2 points
put that as a faction of the wavelength
times it by 2pi
how to find phase difference using the period
find the period of both
find the delay
put the delay/time period
times by 2pi
what phase difference shows that waves are in phase
when they are multiples of 2
what phase difference shows that waves are in antiphase
when they are an odd number of pi
