Transmitted light

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The light that passes through a material. Transmitted light is produced by placing a light source on one side of a material and a detector, such as a camera or human eye, on the opposite side. Visually, the light that passes through the material can be used to detect flaws, fractures, density variations, and color. Transmitted light is measured in terms of transmittance, which is the ratio of the transmitted light to the incident light expressed either as a fraction or as a percentage.

Synonyms and Related Terms

Durchlicht (Deut.); lumière transmise (Fr.); transmittance

Resources and Citations

  • ASTM, Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials, Annual Book of ASTM Standards, Section 14, General Methods and Instrumentation, ASTM, G113, 1371-1373, Sep-94
  • Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982

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