- Physics. the ratio of the radiant flux transmitted through and emerging from a body to the total flux incident on it: equivalent to one minus the absorptance.
Origin of transmittance
Also called transmission.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for transmittance
Music fills all which contains life, and uses all materials for its transmittance.Seed Thoughts for Singers
Frank Herbert Tubbs
- the act of transmitting
- Also called: transmission factor physics a measure of the ability of anything to transmit radiation, equal to the ratio of the transmitted flux to the incident flux; the reciprocal of the opacity. For a plate of material the ratio of the flux leaving the entry surface to that reaching the exit surface is the internal transmittanceSymbol: τ Compare reflectance, absorptance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for transmittance
Online Etymology Dictionary, © 2010 Douglas Harper