Depth of the water in a tank=d,if the water is replaced by turpentine oil what will be the change in the area of Snell's window
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(also called
) is a phenomenon by which an
Snell's window
sees everything above the surface through a cone of light of width of about 96 degrees.
refraction
This phenomenon is caused by
of light entering water, and is governed by
The area outside Snell's window will either be completely dark or show a reflection of underwater objects by
Underwater photographers sometimes compose photographs from below such that their subjects fall inside Snell's window, which backlights and focuses attention on the subjects.
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