• Law of Reflection
  • Angle of incidence == angle of reflection
• Curved Mirrors
  • Concave
    • Converges at 1 focal point in front
  • Convex
    • diverges from focal point behind
    • gives a reduced and upright image
  • Diffuse Reflection
    • 
    • The light is reflected in many different directions
    • can be smooth for some waves and not for another
    • paper is rough for light, but smooth for a radio wave
  • Refraction
    • occurs when the ave speed of light changes from going through transparent mediums
    • Ex. Water in a cup
  • Lenses
    • Converging
      • Converge at one focal point
      • llike concave mirror
      • can be used to zoom in or reduced/inverted
      • used for glasses, microscopes, mag glass
    • Diverging
      • Diverg e from one focal point
      • reduced and upright image
      • Used in Telescopes, spy hole in dor etc
    • Defects
      • distortion is called aberration
      • more than 1 lens stops apperations
      • Spherical Aberration
        • doesn't converge at one point
      • Chromatic abberation
        • different speeds of colors cause them to separate
        • 
  • Huygen's Principle
    • every wave front can create others
    • IDEA: Wave fronts are made of of tiny wave fronts
    • 
    • Diffraction
      • Wave can pass through opening/barrier
      • if light goes through a slit, it diffracts, won't show the light on the back
    • Interference
      • combined amplitude
      •