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Light and Sound Waves - Coggle Diagram

- - - - Virtual image formed where light rays appear to come from
        
        Can't be projected onto a screen
  - - - Mirror has a smooth surface that reflects light rays without scattering them
        
        Reflection from smooth surface = specular reflection because parallel light rays are reflected in a single direction
    - - Parallel light rays reflected from rough surface and scattered in different directions
        
        Reflection from rough surface = diffuse reflection as light is scattered in different directions
- - - - Angle of Refraction < Angle of Incidence
    - - Angle of Refraction > Angle of Incidence
- - - - Surface looks white as reflected light includes all colours of white light
    - - Surface reflects red component of incident white light
        
        If book placed in blue light it would look black as it would absorb all incident light
- - - - Where the parallel rays focus to is the principal focus
        
        Used in magnifying glass and cameras to make clear images of distant objects
    - - Where they appear to come from is the principal focus
        
        Used to correct short sight
  - - - This is because rats from any object are almost parallel when they reach the lens
    - - Closer lens = larger image