Click on wave 2 and drag it to change the path difference between wave
1 and wave 2
We can say that the two waves are -1.00
p rad out
of phase, or the two waves are
-0.50 wavelength out of phase.
Note that we will get the same wave if we
change the phase of a sinusoidal wave by an integer multiple of 2
p rad or we shift a sinusoidal wave by a distance equal to an
integer multiple of l. For example,
a phase difference of 10.2 p rad is
equivalent to a phase difference of 0.2 p
rad and a path difference of 5.1 l is
equivalent to a path difference of 0.1 l.