|Fogbow, Brocken Spectre & Glory
Images by Boris Borisovitch (journal). Taken one morning on Mount Yukspor, Khibini mountains in the centre of the Kola Peninsula, Arctic Russia (67.4N 33.4E).
Boris casts a long shadow through the thin mist to create a ghostly ‘Brocken Spectre’.
Surrounding his head’s shadow, or more accurately the position the camera shadow would occupy, is a small bright circular glory.
The whole scene is dominated by a huge and almost white fogbow with an inner, more coloured, supernumerary fringe.
An account of the morning with many more images is here.
All images ©Boris Borisovitch, Snowman_pro and shown with permission
|Enhancement reveals traces of the rarely seen or photographed secondary fogbow. The outer bow is the diffraction equivalent of the secondary rainbow.|
|The glory is rather more sensitive to droplet size than the fogbow. Its size changed during the apparition.|
The central glory is more mysterious. It has no classical ray path analogue - That shown is impossible for water drops.
|Waves internally reflected once make the fogbow. Wave spread, diffraction, gives a diffuse almost colourless ring rather than the sharp highly coloured rainbow produced by much larger raindrops.|
|Incoming plane waves of sunlight scatter from small mist droplets to form an outgoing stream of spherical waves.|