Please enable JavaScript.

Coggle requires JavaScript to display documents.

physics (waves (electro magnetic waves (types (microwaves (this can be…

- - - - gamma rays
      - x-rays
      - ultraviolet
      - visible light
      - infared
      - microwaves
        
        this can be used to send information to and from sattalites
      - radio waves
    - - all electromagnetic waves can be reflected when they arrive at a boundary between one substance and anoter
      - a normal is an imaginary line which is at right angles to a surface.
      - the angle of incidence is the angle between the incident ray and the normal
      - the angle of reflection is the angle between the reflected ray and the normal
      - angle of incidence= angle of reflection
      - weather or not a wave is reflected depends on its wavelength
      - refraction
        
        refraction is the change of direction in the wave as it travels from one medium into another
        
        it happens when a wave changes speed upon travelling from the first medium into the second
        
        the angle of refraction is the angle between the refracted wave and the normal
    - - this causes them to refract towards the normal
      - it also decreases their wavelength
- - - - the forces of attraction between them are very weak