Links to related material  
Travelling waves, superposition, reflection and transmission
Wave pulses in a stretched string. Equations for a travelling wave. Linear media. Superposition. The limits of linearity. Reflections at fixed and free boundaries. Reflection and transmission at step changes in density.
The travelling sine wave
Describing the travelling sine wave. Comoving and fixed coordinates. y = sin (kx − ωt). Three dimensional plots. Phases in a travelling wave.
Moving frames of reference
Vector addition and subtraction. Position, velocity and acceleration in different frames.
Oscillations
Inertia plus a restoring force produces oscillations. The mechanical equation for Simple Harmonic Motion. Initial conditions. Cyclic and angular frequency. Mechanical and kinetic energies. The simple pendulum. A nonlinear pendulum. Damped oscillations. Forced oscillations. Resonance in one, two and three dimensions.
Simple Harmonic Motion
Simple Harmonic Motion as a projection of circular motion. Displacement, velocity and acceleration. Chladni patterns and sinusoidal vibration.
The Mexican Wave
The mexican wave (or stadium wave) is an example of a travelling wave.

Laboratory

 


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