Mechanical vs. Electromagnetic Mechanical waves: require a medium to travel through. Ex: Sound Electromagnetic waves: do not require a medium. Ex. light
Mechanical Types 1) Transverse: causes particles of medium to vibrate perpendicularly to direction wave travels. Ex: water http://www.acoustics.salfor d.ac.uk/feschools/waves/fla sh/transverse.swf Transverse Wave
Crest: highest pt Trough: lowest pt Amplitude: greatest distance that particles in medium move when a wave passes. Wavelength: dist. from 1 crest of wave to next crest. Frequency: # of full wavelengths that pass a point in a given time.