Summary
This section on mechanical waves covers how disturbances propagate through various media by vibrating particles about their equilibrium positions. The mathematical framework of traveling waves describes how parameters such as amplitude, frequency, period, wavelength, and wave speed relate to each other. The phenomena of reflection, interference, and superposition lead to the creation of standing waves in strings and air columns, with applications ranging from musical instruments to Doppler radar and medical ultrasound. The Doppler effect further illustrates how relative motion between the source and observer results in perceived frequency shifts.