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-The principle of superposition is used too describe the interference of the waves.
- Constructive interference occurs when waaves meet and add together so that the resulting amplitude is greater than any of the individual amplitudes.
- Destructive interference occurs when wavves meet and cancel each other out so that the resulting amplitude is lesser than any of the individual amplitudes.
-When a pulse reaches a boundary it may bee reflected inverted, reflected upright, or not reflected at all.
- When the string at boundary is held tighht , the pulse will be reflected upside down.
- When the string at the boundary is held loosely at the boundary, the pulse will be reflected upright.
- When the string is held at a tension sommewhere between tight and loose, the pulse will not be reflected at all.
- All waves exhibit reflection and transmiission at a junction. When a pulse arrives at a junction where the wave travels into a denser medium, part of the wave will be transmitted upright and part will be reflected inverted.
- When a pulse arrives at a junction wheree the wave travels into a less dense medium, both the reflected and transmitted parts are transmitted upright.
- A node (n) is a position on a standing wwave where no motion occurs. The possible wavelengths of standing waves that can be produced on a length (L) of string fixed at both ends are:
λ = 2L/n
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