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  2. Snell's window - Wikipedia

    en.wikipedia.org/wiki/Snell's_window

    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]

  3. Glossary of shapes with metaphorical names - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_shapes_with...

    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

  4. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    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)

  5. A new study explains the origin of mysterious 'fairy circles ...

    www.aol.com/news/2017-01-18-a-new-study-explains...

    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.

  6. Can you spot the circles hidden among these rectangles? - AOL

    www.aol.com/news/2017-08-14-can-you-spot-the...

    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 ...

  7. In the ocean, 'sharks are around you and you just don't know ...

    www.aol.com/lifestyle/ocean-sharks-around-just...

    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 ...

  8. Fata Morgana (mirage) - Wikipedia

    en.wikipedia.org/wiki/Fata_Morgana_(mirage)

    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 ...

  9. Fallstreak hole - Wikipedia

    en.wikipedia.org/wiki/Fallstreak_hole

    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.

  1. Related searches things that look like circles in the middle of the ocean read

    things that look like circles in the middle of the ocean read aloud