Distance a particle moves in a particular direction from its mean (equilibrium) position. x
Amplitude
Maximum displacement from the mean position. x0
Simple Harmonic Motion
Motion that takes place when the acceleration of an object is proportional to its displacement from its equilibriumposition and is always directed toward its equilibrium position (NOTE: this motion is defined by the equation a = -ω2x)
Transverse Wave
Wave in which the direction of motion of the energy transfer (the wave) is perpendicular to the direction of motion of the particles of the medium (NOTE: light waves are transverse) (NOTE: transverse waves cannot be propagated in gases)