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Physics - Light - Coggle Diagram

- - - - Sun
      - Lightbulb
      - Lighthouse
      - Car lights
      - Traffic lights
  - - - light passes through
    - - light does not pass through
    - - only some light passes through
    - - goes in all directions
    - - wave energy goes into the material
    - - gives out its own light
    - - can only be seen because of reflected light
    - - the production and emission of light by a living organism
    - - how far a point on the wave is from the rest position
    - - distance from peak to peak (or any complete wave cycle)
    - - maximum displacement of a wave
  - - - caused by a vibration that is perpendicular to the direction of wave travel
    - - cause by a vibration that is parellel to the direction of wave travel
- - - - glasses - long-sighted
      - Magnifying glasses
      - Telescopes
  - - - transparent layer at the front of the eye. some refraction of light occurs here
    - - contains cells that can detect light and colour. sensitive to light that is too bright and can be damaged
    - - refracts light that passes through it
      - muscles can change the shape of the lens so it can refract light by different amounts
    - - coloured part of the eye around pupil. light does not pass through
    - - dark area in the middle of the eye. light passes through
    - - carries the signal from the retina to the brain
- - - - 200,000,000 m/s
      - Light has a higher refractive index than a vacuum
  - - - A decrease in wavelength of the light
      - Unless the angle of incidence is 0°, there will be a change in direction of the light
- - - - Dispersion
        
        what causes rainbows
        
        happens because different colours of light experience a different refractive index, so refract by different amounts
        
        Violet refracts most - highest refractive index
        
        Red refracts least - lowest refractive index