Fog Corona and Crepuscular Rays of the Sun
Date: | 1.5.2000
| Instrument: | f=50mm
|
Place: | Tenerife, Spain
| Observer: | T. Credner, S. Kohle
|
© Copyright by the observers
Such colorful coronas around the sun, not to be mistaken with the
corona of suns outer atmosphere,
appear in clouds with small water drops, that all have similar sizes.
Light scattering at such water droplets results in colorful interference
rings. In the image above you can see about three to four such rings. The
scattering particles were quite close as the appearance is even visible
in front of the trees. The partly obscuration of the solar light by the
trees produces the radial appearing crepuscular rays. In the antisolar
direction an impressive
colorful glory was visible
together with the observers shadow in the fog.
See also:
Les Cowley:
Simulation of
the above image and comparison with the simultaneous Glory
M.G.J. Minnaert: "Light and Color in the Outdoors", Springer-Verlag
R. Greenler: "Rainbows, Halos, and Glories", Cambridge University Press