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> > name Bill > > status educator > > Question - Why are some things like glass clear, in that we can see > > through them, while other obects like wood and not clear. There are at least three effects to consider: ... Reflection Light reflects off the surface. This can be ... NEWTON is an electronic community for Science, Math,
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www.newton.dep.anl.gov/askasci/chem99/chem99531.htm
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>> name Bill >> status educator >> Question - Why are some things like glass clear, in that we can see >> through them, while other obects like wood and not clear. A material needs to have two properties to be clear. ... First, it must not absorb visible wavelengths of light. Paper and snow contain lots of air pockets;
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www.newton.dep.anl.gov/askasci/chem99/chem99523.htm
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During our study of the basic properties of sound, we learn about the types of objects or materials that sound can travel through. Specifically, we learn that sound can travel through solids, liquids and gases. ... Students choose any item from the table to determine if it is transparent, translucent or opaque and record it...
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www.teacherfiles.com/sharing_science.htm
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objects on the other side of a translucent object appear fuzzy and unclear. Because translucent objects are semi-transparent, some ultraviolet rays can go through them. This is why a person behind a translucent object can get a sunburn on a sunny day.
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science.jrank.org/pages/1593/Color-Transparent-transluc...
science.jrank.org/pages/1593/Color-Transparent-translucent-opaque.html
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Caustics are patterns of light formed by reflection or refraction of light from objects, and several methods have been developed to render caustics because of their visually beautiful patterns. This paper proposes a method for the rapid rendering of caustics formed by refracted light through transparent objects.
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doi.ieeecomputersociety.org/10.1109/CW.2004.12
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Few methods have been proposed to measure three-dimensional shapes of transparent objects such as those made of glass and acrylic. In this paper, we propose a novel method for estimating the surface shapes of transparent objects by analyzing the polarization state of the light. ... Daisuke Miyazaki, Katsushi Ikeuchi, ... IEEE CS Conf.
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doi.ieeecomputersociety.org/10.1109/TPAMI.2007.1117
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We tested the hypothesis that polarization sensitivity enhances the detection of moving, transparent objects by examining the escape response of the red swamp crayfish (Procambarus clarkii Girard) from a visual threat.
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jeb.biologists.org/cgi/content/abstract/209/9/1612
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Well, so the shadows of transparent objects bugged me, so I hacked in some caustic stuff... which totally doesn't trace the rays through the object recursively or anything cool like that...it is just a silly little heuristic I thought of that seems to produce reasonable looking effects.
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web.radiantenergy.org/projects/cs/graphics/rendering/ca...
web.radiantenergy.org/projects/cs/graphics/rendering/caustic
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