00:01
So here in this problem we have been given that there are two waves which are moving in the same direction.
00:10
And here we have been given the amplitude of these two individual waves and also the amplitude of the resultant of these two waves, which is 1 .27 times of the individual amplitude.
00:26
So we need to figure out the phase difference between these two moving waves.
00:33
So if we observe here the expression of resultant amplitude, that is equal to root of a1 square plus a2 square plus two times of a1, a2, cos phi.
00:48
So this is the expression to determine the resultant amplitude.
00:53
So here we'll put the results, whatever we have been given.
00:56
So resultant amplitude, that's 1 .27 times a.
01:01
And we should of course square this to remove the root.
01:05
That will be equal to a square plus a square plus two times a1, a2, that will be 2a2, that will be 2a square here, and then cause 5.
01:14
So first we can remove a square from all sides...