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Re: pic: Game hint
Quote:
Originally Posted by Daniel_LaFleur
Light does pass through the air water barrier but it bends as it does so.
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Water's refractive index is about 4/3. Light originating on the water side will be partially reflected (back into the water) and partially refracted (into the air) at angles given by Snell's Law. Light originating in the water and incident on the surface at an angle greater than about 49 degrees will be totally reflected back into the water.
So some underwater positions will permit better transmission of IR than others.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
 since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
Last edited by Richard Wallace : 19-12-2007 at 18:09.
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