Home 
  OpticsPOD
  What's New 
  Rays & Shadows
  Water Droplets
  Rainbows
    
Not a rainbow!
    Primary
    Secondary
    A's Dark Band
    Other Orders
    Supernumeraries
    Red Bows
    Rainbow Wheel
    Dew Bow
    Sea Spray Bow
    Glass Bead Bows
    Reflection Bows
    Twinned Bows
    Cloud Bows
    Moon Bows
    Image Gallery
    Simulators
  Ice Halos
  High Atmosphere
  Links & Resources
  Search - Index



 
123456789012345678


  Not a rainbow! 
 

Not all coloured patches in the sky are rainbows.

Rainbows are formed by refraction and reflection of sunlight by raindrops.   When sunlight passes through ice crystals, halos form and they are mostly coloured .    Small cloud or fog droplets diffract light to form ringed glories, coronae and the jumbled colours of iridescent clouds.
 
  Click images for individual topics