Revision

Revision

1. Waves

   • Longitudinal
     • Back and forward
     • P waves
     • the vibrations are along the same direction as the direction of travel.
     • compression- waves close together
     • Rarefaction- waves spread out
   • Transverse
     • Perpendicular angles
     • Up and down
     • Water waves
     • S waves

2. Electromagnetic radiation

   • Energy travelling as waves in the form of changing electrical and magnetic fields.
   • they can travel through an empty

3. Waves are vibrations that transfer energy

4. Amplitude

   • The amplitude of a wave is its maximum disturbance from its undisturbed position.

5. Wavelength

   • the distance between a point on one wave and the same point on the next wave
   • often easiest to measure this from the crest of one wave to the crest of the next wave