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Snell's window (also called Snell's circle [1] or optical man-hole [2]) is a phenomenon by which an underwater viewer sees everything above the surface through a cone of light of width of about 96 degrees. [3] This phenomenon is caused by refraction of light entering water, and is governed by Snell's Law. [4]
Aquiline, shaped like an eagle's beak (as in a Roman nose) Bell-shaped curve; Biconic shape, a shape in a way opposite to the hourglass: it is based on two oppositely oriented cones or truncated cones with their bases joined; the cones are not necessarily the same Bowtie shape, in two dimensions; Atmospheric reentry apparatus
The two orange circles are exactly the same size; however, the one on the right appears larger. Ehrenstein illusion: The Ehrenstein illusion is an optical illusion studied by the German psychologist Walter Ehrenstein in which the sides of a square placed inside a pattern of concentric circles take an apparent curved shape. Fata Morgana (mirage)
Just like you might think rocks that seem to move on their own are driven by a power not of this world. But now both of those mysteries have something in common: totally natural explanations.
Take a look and see if you're able to find them: If you're having trouble spotting the circles, don't go crazy. Just relax your eyes a little bit while you're staring at the photo and, hopefully ...
If you look at maybe something like a six-foot bull shark, just by the sheer size, it's going to do a lot more damage." Kinsler's verdict: It's extremely rare to encounter a shark in the wild and ...
The last two frames were photographed a few hours later, around sunset time. At that point in time, the air was cooler while the ocean was probably a little bit warmer, which caused the thermal inversion to be not as extreme as it was few hours before. A mirage was still present at that point, but it was not so complex as a few hours before ...
A fallstreak hole (also known as a cavum, [1] hole punch cloud, punch hole cloud, skypunch, cloud canal or cloud hole) is a large gap, usually circular or elliptical, that can appear in cirrocumulus or altocumulus clouds.