The behavior of a wave reflecting at a boundary on the wave machine depends on whether the boundary is free or clamped.
Watch The Video:
This demo shows the wave patterns of three different instruments:
a flute, a saxophone, and a trumpet.
Watch Video:
Transverse standing waves with 3 different boundary conditions.
Watch The Video:
Standing waves with two free boundaries
When two waves overlap, the resulting wave is the sum of the two original waves.
Watch The Videos:
Destructive Interference
The normal modes of a standing wave are all just multiples of the fundamental frequency.
WATCH THE VIDEO