Waves

• rest position


  the undisturbed position of particles or fields when they are not vibrating.
• displacement


  the distance that a certain point in the medium has moved from its rest position.
• peak


  the highest point above the rest position.
• trough 


  the lowest point below the rest position.
• amplitude


  the maximum displacement of a point of a wave from its rest position.
• wavelength


  distance covered by a full cycle of the wave, usually measured from peak to peak or trough to trough.
• time period


  the time taken for a full cycle of the wave, usually measured from peak to peak or trough to trough.
• frequency


  the number of waves passing a point each second.
• Diagram of a wave

  A) peak

  B) amplitude

  C) wavelength

  D) rest position

  E) trough

  F) wavelength

  G) wavelength

  
• Electromagnetic Spectrum

  A) Radio (Rascist)

  B) Microwave (Men)

  C) Infrared (In)

  D) Visible (Vans)

  E) Ultraviolet (Unpeel)

  F) X-Rays (Excitable)

  G) Gamma (Grapefruits)