• Light waves are electromagnetic waves
  • Light is a transverse wave
  • Polarization
    • Filters waves
    • Light every day is non polarized
    • once light is polarized, its only 1 direction
    • The more you tilt the polarizer, the less the intensity
      • Proof of transverse wave
  • Electromagnetic waves
    • If you shake a charged rod, you create electromagnetic waves
    • Vibrating fields regenerate each other
    • lowest frequency of light is red, highest is violet
    • NOT Mechanical wave
      • Can be in vacuum
    • speed is 3e8 m/s
    • longer to travel in denser mediums, but speed is constant
  • Colors of light
    • Roy G Biv
    • RGB Colored Light
  • REFLECTION
    • We see objects because they reflect light
    • Color is from the reflected light (not absorbed)
    • reflects all other colors than the ones it resonates with
  • Why sky is blue
    • short wavelengths get scattered by particles a lot more than others
  • Why sunset is red
    • more atmosphere to go through
    • The blue is already scattered, and red is there
  • Why clouds white
    • clouds scatter all colors equally