wave reflection and refraction

• give law of reflection

  angle of incidence = angle of reflection
• describe specular diffusion 


  light rays reflected in same direction from smooth surface
• describe diffuse reflection


  light rays reflected in different direction on rough surface
• describe refraction 


  wave changes direction at boundary at an angle
• describe affect of refraction

  wavespeed changes due to changing wavelength but constant frequency
• describe affect of refraction in denser medium

  1. constant frequency
  2. wavelength decrease
  3. wavespeed decrease
  4. wave bend towards normal
• describe affect of travelling into less dense medium

  1. constant frequency
  2. wavelength increase
  3. wavespeed increase
  4. wave bend away from normal