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Transparency and translucency. 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 the material without appreciable scattering of light. On a macroscopic scale (one in which the dimensions are ...
Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light. In radiative transfer, it describes the absorption and scattering of radiation in a medium, such as a plasma, dielectric, shielding material, glass, etc. An opaque object is neither transparent (allowing all light to pass through ...
Opaque context. An opaque context or referentially opaque context is a linguistic context in which it is not always possible to substitute "co-referential" expressions (expressions referring to the same object) without altering the truth of sentences. [1] The expressions involved are usually grammatically singular terms.
Opaque data type. In computer science, an opaque data type is a data type whose concrete data structure is not defined in an interface. This enforces information hiding, since its values can only be manipulated by calling subroutines that have access to the missing information. The concrete representation of the type is hidden from its users ...
Example. — The ‘_ contains _’ and quote operators are referentially opaque: ‘London’ contains six letters. Indeed, the first position is not purely referential in the statement because substituting The capital of the United Kingdom for London changes the value of the statement and the quotation. So in the first position, the ...
Radiodensity (or radiopacity) is opacity to the radio wave and X-ray portion of the electromagnetic spectrum: that is, the relative inability of those kinds of electromagnetic radiation to pass through a particular material. Radiolucency or hypodensity indicates greater passage (greater transradiancy) to X-ray photons [1] and is the analogue of ...
Such examples include Japanese kana, Hindi, Lao (since 1975), Spanish, Finnish, Turkish, Georgian, Latin, Italian, Serbo-Croatian, Ukrainian, and Welsh. In contrast, in deep (opaque) orthographies, the relationship is less direct, and the reader must learn the arbitrary or unusual pronunciations of irregular words.
In the field of lexical semantics, semantic transparency (in adjective form: semantically transparent) is a measure of the degree to which the meaning of a multimorphemic combination can be synchronically related to the meaning of its constituents. Semantic transparency is a scalar notion. At the top end of the scale are combinations whose ...