Waves Transmit Energy Categories/Types Mechanical: Needs a medium to travel through Water Seismic Electromagnetic: Travels through space and mediums Sound Radio Infrared Microwave Transverse Transverse (S) & Longitudinal (P) Longitudinal ultraviolet Light gamma X-ray Transverse Wave Properties Compressions Amplitude Longitudinal Transverse Wavelength Crest Rarefactions Trough Wave Behaviors Reflection Lenses Light Refraction Mirrors Diffraction