Travelling wave

The most general description of a wave 

Phase and amplitude for different scenarios 

Understanding what is phase 

Angular frequency , Wave number, Angular velocity, and Phase velocity terminology 

Phase velocity 

Phase velocity cosiderations 

Phase and displacement 

Oscillators that are not harmonic 

Phet -wave interference:     Waves - Interference - Slits - Diffraction 

Desmos - Travelling wave

Desmos - Phase difference between two locations  

Medium          Coupling          Equilibrium          Restoring force          The meaning of the displacement

Profile / shape of a propagating  disturbance in a medium        

Direction of  propagation

Displacement  of the particles and  illusion of the motion of the shape

Speed of the wave is property of the medium

Simple harmonic oscillator as source      Amplitude      Frequency         Wavelength        **Velocity of the displacement