which gives the amplitude variation shown in Figure 6.2(a). This is the fundamental
mode or first harmonic of the string; n = 2 corresponds to the second harmonic,
n = 3 corresponds to the third harmonic, etc. We see that the number of antinodes
in the nth harmonic is equal to n. The corresponding angular frequencies ωn of
the standing waves are given by Equation (6.8) and are πv/L, 2πv/L, 3πv/L and
4πv/L, respectively. The time period T for a standing wave pattern to exactly to
reproduce its shape is given by