Chapter 14. Superposition & Standing waves. The Principle of Superposition. If two or more traveling waves are moving through a medium, the resultant wave function at any point is the algebraic sum of the wave functions of individual waves.
In phase f=0,
Out of phase f=p, destructive interference
Other phase f=p/3, y falls to somewhere between the extremes
The wavelength of the nth mode of vibration
the fundamental mode
A higher harmonic standing wave on a disk with two nodal lines crossing at the center.