New: atmosphericoptics

jonshock (37)in sundog • 7 years ago
When your crystals are like plates, you get sundogs
In the last post ( we saw how a 22 degree solar halo was created from hexagonal column crystals of ice. These crystals take all different orientations in the sky and thus give rise to the light that…
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jonshock (37)in solarhalo • 7 years ago
The beauty of the 22 degree solar halo
(taken by me back in 2008) A photon is produced in a fusion reaction at the centre of the sun a million years ago. It whizzes out, carrying momentum, and soon after it has left the fused atoms, it…
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jonshock (37)in atmosphericoptics • 7 years ago
The green flash - legend and reality
Legend has it that just as the sun sets, if the conditions are perfect, then you will see a brilliant flash of green. Such phenomena have been talked about by sailors and travelers for centuries.…
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