Wednesday, October 12, 2011

NATURAL PHENOMEN

 

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FIRE RAINBOW

The Fire Rainbow is the ‘lax term for the atmospheric phenomenon, circumhorizontal arc.

The rainbow occurs when the sun is more than 58 degrees above the horizon, and the light emitted passes through a cirrus clouds. Cirrus clouds, which are made up of hexagonal ice crystals, must be shaped like plates parallel to the ground for the effect to occur. When the sun’s light enters the cloud vertically, the light leaves the ice crystal from the bottom, and the crystal bends the light to form the rainbow arc.

The effect is similar to what you would witness when a light is filtered through a prism.

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