Waves

Waves

1. Waves transfer energy & info without transferring matter. Evidence of this for a water wave can be seen when a ball dropped into a pond bobs up and down but the wave energy travels outwards as ripples across the surface of the pond.

2. Waves can be described by their Frequency - the number of waves passing a point each second, measured in hertz (Hz) Speed - measured in metres per second (m/s) Wavelength and Amplitude Period - the time taken for one wavelength to pass a point Period = 1/frequency

3. Longitudinal waves Sound waves are longitudinal waves. The particles in the material the sound is travelling through move back and forth along the same direction that the sound is travelling.

4. Transverse waves Waves on a water surface , electromagnet waves are transverse waves. The particles of water move in a direction the wave is travelling.