Mechanical Waves: produced when a source of energy causes a medium to vibrate, require a medium to travel through; like solids or liquids, Electromagnetic Waves: does not require a medium to travel through, Transverse Waves: direction of the wave is traveling perpendicular to the direction the transverse is moving, light wave, Longitudinal Waves: wave is traveling in a direction that is parallel to the direction of the medium, sound wave,

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