June 17, 2012


Thereโ€™s a rare phenomenon called fire rainbows!

The fire rainbow is the rarest of all naturally occurring phenomena. The clouds must be cirrus and at an altitude of 20,000 feet at least. There must be just the right amount of ice crystals present, as well.

The sun has to hit the clouds at exactly 58 degrees. It makes the rainbow appear to be on fire, hence the name. Itโ€™s actually cold as ice, though. In the weather world, the phenomena is known as a circumhorizontal arc.

It isnโ€™t a traditional rainbow, per se, but an effect that happens when light passes through wispy cirrus clouds at high altitudes. Even more specifically, the hexagonal ice crystals that make up the cirrus clouds must be shaped like thick plates with their faces parallel to the ground for the fire rainbow to appear.

The light enters through a vertical side face of the hexagon and leaves through the bottom causing the light to refract, or bend, like in a prism. If the crystals are aligned precisely, then the whole cloud lights up as a rainbow.


28 notes

repeat from A Lost Case

28 Notes

  1. lilliephoenix reblogged this from believeinloosedelights
  2. tribyen reblogged this from theonecalledeli and added:
  3. theonecalledeli reblogged this from ladywlvs
  4. spirited-away reblogged this from yeougateungijibae
  5. yeougateungijibae reblogged this from believeinloosedelights
  6. lalavillamia reblogged this from believeinloosedelights
  7. wo-ist-pussy reblogged this from believeinloosedelights
  8. fagturbation reblogged this from believeinloosedelights
  9. celestial-fake-messiah reblogged this from believeinloosedelights
  10. letsgetlost-tonight reblogged this from ladywlvs
  11. ladywlvs reblogged this from aboredchica
  12. smile-like--you-mean-it reblogged this from badwildchild
  13. badwildchild reblogged this from theendlessloveoflouisandharry
  14. theendlessloveoflouisandharry reblogged this from janape
  15. pandabetha reblogged this from janape
  16. aboredchica reblogged this from janape and added:
    Wow. That’s gorgeous!
  17. janape posted this