P6

• Amplitude


  Maximum displacement of a point on a wave from its average position
• Wavelength


  The distance from one point on a wave to the same point on another wave
• Period


  The time it takes for a wave to pass a point
• Frequency


  The number of waves that pass a point per second
• Wave speed


  Frequency x Wavelength
• Transverse waves


  • Oscillations are perpendicular to the direction of energy transfer
• Longitudinal waves


  • Oscillations are parallel to the direction of energy transfer
• Radio waves


  Produced when electrons oscillate in an electric circuit
• UV radiation


  • Can cause skin to age prematurely
• 1. rays and gamma rays

  • Are ionising radiation that can knock off electrons and cause mutations, increasing risk of cancer
• what is frequency measure in?

  Hertz
• What is period measured in?

  seconds
• what is the unit for wavelength?

  Lambda