|Omega Suns & Road Mirages ~
At upper right, Attila Kovács imaged a low sun above a hot road surface. The sun is miraged by the layer of heated air into a replica of an 'omega' or 'Etruscan Vase' sunset. At left Attila pictures an 'omega' miraged road sign. Lower left - A more typical omega sunset pictured over the sea from Maryland by Claudia Hinz.
Attila's images neatly demonstrate that omega sunset mirages are the result of a layer of warm air beneath cooler. For the upper right image - "The air temperature was 30°C and I measured the road surface being between 50-52°C - a difference of 20-22°C between the lower hot and the upper layer."
©Attila Kovács, shown with permission.
The setting sun nears the horizon (or hot road!) and a second upside down sun segment rises up to meet it.
The two rays, 'b' and 'c', cross and form a mirror image.
|Terrestrial and astronomical inferior mirages: The essence - ray crossing remains the same. However, we have to imagine that the sun at infinity. Rays from its upper and lower limb strike the temperature gradients inclined 0.5° differently|