Waves

• a wave transfers energy from one place to another. the particles of a wave do not move however the energy does
• waves travel away from their source
• waves do not always require particles
• amplitude


  how high the wave is
• wavelength 


  the distance between two corresponding points on a wave
• frequency


  how many waves pass by per second, measured in hertz (Hz)
• frequency = 1/time period (s)
• transverse waves have vibrations that are perpendicular to the direction of energy transfer
• examples of transverse waves are light and water
• longitudinal waves have vibrations parallel to the direction of energy transfer
• longitudinal waves show areas of compression and rarefraction
• an example of a longitudinal wave is sound
• the wave equation is wave speed (v) = freq (f) x wavelength (λ)
• the period is the time taken to produce one wave (s)
• Period (T) = 1/frequency (f)