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Transparency and translucency - Wikipedia, the free encyclopedia
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Transparency and translucency
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"Diaphanes" redirects here. For the genus of firefly, see
Diaphanes (beetle).
"Translucence" redirects here. For other uses, see
Translucence (disambiguation).
"Translucent" redirects here. For the Japanese manga series, see
Translucent (manga).
Dichroic filters are created using optically transparent materials.
In the field of
optics, transparency (also called pellucidity or diaphaneity) is the
physical property of allowing light to pass through a material; translucency (also called translucence or translucidity) only allows light to pass through diffusely. The opposite property is opacity. Transparent materials appear clear, with the overall appearance of one color, or any combination leading up to a brilliant spectrum of every color. When light encounters a material, it can interact with it in several different ways. These interactions depend on the
wavelength of the light and the nature of the material. Light waves interact with an object by some combination of
reflection, and
transmittance with
refraction.
Some materials, such as
plate glass and clean
water, allow much of the light that falls on them to be transmitted, with little being reflected; such materials are called optically transparent. Many liquids and aqueous solutions are highly transparent. Absence of structural defects (voids, cracks, etc.) and molecular structure of most liquids are mostly responsible for excellent optical transmission.
Materials which do not allow the transmission of light are called
opaque. Many such substances have a
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