Refraction of waves

• What is one way in which energy may be transferred between stores?

  Waves
• What do both mechanical and electromagnetic waves transfer?

  Energy but not matter
• What is refraction of waves?

  • Process where a wave changes speed and direction
  • Occurs upon entering a denser or less dense medium
  • All wave types can be refracted
• What happens to a wave at the interface between two materials?

  It may change direction
• What is a ray diagram?

  A diagram that represents the direction and angle of travel of light
• What factors affect the speed of a wave transmitted through a material?

  • Density of the material
  • Compactness of the material
• How is density measured?

  In kilograms per metre cubed (kg/m³) or grams per centimetre cubed (g/cm³)
• What does the acronym 'FAST' help to remember in relation to wave refraction?

  • Faster - Away
  • Slower - Towards
• What is the key fact about wave refraction?

  It involves changes in speed and direction of waves
• What types of waves can be refracted?

  All wave types
• How does the density of a material affect wave transmission?

  It affects the speed at which a wave is transmitted