Two Romanian Glories pictured by Radu Gherase in the Fagaras Mountains. Image İRadu Gherase, shown with permission.
Essentials for a mountain glory and Brocken spectre are sunlight shining down into mist.

Wave optics - Diffraction and backscattering by the mist droplets give the colourful ringed glory opposite the sun.

Ray optics - Simple shadowing, the long shadow cast by the observer through the mist, generate the Brocken spectre.

Atmospheric
Optics

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