...es, e.g., sound waves, wa...omagnetic waves, e.g., li..., protons and other funda...These waves travel in...of crests and troughs....frequency and wavelength...ity. Sound Waves Soun...standing waves. Equat...n1 : n2 : n3 : &he...gitudial) sounds. Organ p...heta; = 0 and there is no...