Waves

• Wavelength


  Distance between one crest to the next
• Amplitude


  The distance from the waves equilibrium to the crest
• Speed


  How many metres a crest of a wave travels a second
• Frequency


  How many waves that go past a second
• Shorter / closer waves

  More energy
• Longitudinal Waves


  • Vibrates material in the same direction of the waves motion
• Transverse waves


  • Vibrates materials at right angles to the direction of the waves motion
• Mechanical wave


  Travels through material
• Electromagnetic


  Can travel through space
• Waves carry energy but the material they travel through does not travel with them
• Direction of vibration with transverse waves

  • Right angles at which the direction the energy travels
• Direction of longitudinal waves

  • Parallel to the direction the wave travels
• Direction of energy transfer in longitudinal waves

  • Parallel
• Waves travel in straight lines
• Waves travel at different speeds through different materials
• What waves can do when they strike a surface

  • Reflect
  • Refract
  • Be absorbed
• Reflect


  Bounces off a surface, heads off in a new path
• Absorb


  When a wave gives it energy then dies
• Refract


  If the medium is transparent, light can go into the material
• Sound waves


  Mechanical wave
• The pitch of a sound wave


  Related to its frequency
• The volume of a sound wave


  Determined by its amplitude
• Sound waves


  • Longitudinal
• How sound travels through air

  Through the vibration of air particles
• Sound waves bounce off things, some that direct to the person's ear and the rest bounce off the walls that creates an echo
• Order of electromagnetic waves

  • Radio waves
  • Micro waves
  • Infrared waves
  • Visible light
  • UV Rays
  • X-Rays
  • Gamma Rays
• Use of Radio waves


  • TV communication
• Use of Microwaves


  • Mobile phone connecting
• Use of infra red rays

  • Night vision googles