Swimming pool water refraction - GIF

[Altair]

Swimming pool water refraction.




Previously:

Power transmission lines showing the curvature of the Earth - GIF
Light passing through different lenses - GIF
Gradient index optics demonstration - GIF
Schlieren optics - GIF

[hemmjo]

There is a cool pool like that at the Cleveland Clinic in Cleveland, Ohio. But you cannot swim in it. Well I guess you could swim in it, but I do not think they would be happy. Most fascinating to me is how level it is all around both inside and outside edges.