- Columnar crystals
- singly or doubly oriented
- Refraction at both base surfaces and double reflection at side surfaces
- very rare
Description
Crystal type:
Simulation
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Origin
The sub-solar arc is formed by column crystals with a horizontal longitudinal axis or by column crystals in Parry orientation. The sunlight enters through one of the end faces of the crystal and exits after two internal reflections through the other. This light path is comparable to the light path in a kaleidoscope.
Photos
Left part of the subsundog in the ice fog. Taken at the Sudelfeld (Photo: Claudia Hinz)
Subsun bow in ice fog, taken on 30.01.2014 (Photo: Wolfgang Hinz)
Right part of the subsun bow in ice fog. Taken on 22.01.2017 in Jena (Photo: Marco Rank)