OPTICAL ILLUSIONS AND MARVELS
Added on: 28th Jan 2016
DEW ON SPIDER WEB
Early in the morning spider webs can create some amazing
“floating water” illusions.
GREEN FLASH
Sometimes occurring right before or after sunset, a green spot
will appear right above the rim of the sun for a few seconds.
Although they are caused by a variety of factors, the general
explanation is that light is being bent in the atmosphere.
CIRCUMZENITHAL ARC
Similar to a rainbow, this optical phenomenon typically has much
purer colours. Once again, rather than being caused by
raindrops it is usually caused by ice crystals.
HALO
Often seen around the sun or the moon, the most popular is the
“22 degree halo” often seen around the sun. Sometimes when
a halo surrounds the moon it is called a “moon ring”.
ALPEN GLOW
An interesting phenomenon, this happens when the sun has already
set but due to light reflecting off particles in the atmosphere mountains
can sometimes appear to be illuminated with a reddish glow.
CREPUSCULAR RAYS
These are sun rays that appear to stream through the clouds from
a point in the sky where the sun is located.
AURORA LIGHT
In the northern hemisphere it is known as the Aurora Borealis
while in the southern hemisphere it is called Aurora Australis.
These phenomena are caused by magnetic rays and solar
wind interacting with the upper atmosphere.
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