Absence of structural defects (voids, cracks, etc.) and molecular structure of most liquids are mostly responsible for excellent optical transmission. Many liquids and aqueous solutions are highly transparent. Some materials, such as plate glass and clean water, transmit much of the light that falls on them and reflect little of it such materials are called optically transparent. Photons interact with an object by some combination of reflection, absorption and transmission. These interactions depend on the wavelength of the light and the nature of the material. When light encounters a material, it can interact with it in several different ways. The opposite property of translucency 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. A transparent material is made up of components with a uniform index of refraction. In other words, a translucent material is made up of components with different indices of refraction. Translucency (also called translucence or translucidity) allows light to pass through, but does not necessarily (again, on the macroscopic scale) follow Snell's law the photons can be scattered at either of the two interfaces, or internally, where there is a change in index of refraction. On a macroscopic scale (one in which the dimensions are much larger than the wavelengths of the photons in question), the photons can be said to follow Snell's law. In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without appreciable scattering of light. Wikipedia Rate this definition: 0.0 / 0 votes
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