transmittancen.

Etymology: formed as transmit v. + -ance suffix: compare admittance.Previous versions of the OED give the stress as: transˈmittance.

1. The action of transmitting; transmission. rare.

ΘΚΠ

the world > movement > transference > [noun] > transmission or passing on

communicationc1384

delation1578

transfusion1578

transmission1611

conveyance1646

transmitting1671

transmit1672

transmittal1735

transmittance1855

passage1860

transjection?1867

1855 in H. Clarke New Dict. Eng. Lang. ; and in later Dicts.

2. Physics. The ratio of the transmitted luminous flux to the incident luminous flux.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [noun] > rate, ratio

transmittance1919

square law1921

luminosity1974

1919 Technologic Papers U.S. Bureau of Standards No. 119. 10 The transmittance T is defined as the fraction of radiant power transmitted by the first surface which is incident on the second surface.

1960 Illuminating Engin. 55 228/1 The concepts of transmittance and reflectance can be extended to cover the separation of specular and diffuse components which are functions of angles.

1980 Nature 29 May 313/1 We had to use a shorter path~length (970 m at Riverside and 750 m at Claremont) because of the poor optical transmittance of the polluted atmosphere at our observation sites.

Derivatives

transˈmittancy n. the ratio of the transmittance of a solution to that of a similar body of solvent.

ΘΚΠ

the world > matter > chemistry > physical chemistry > solutions > [noun] > transmittancy

transmittancy1925

1925 Jrnl. Optical Soc. Amer. 10 177 (table) T_sol/T_sov = transmittancy.

1936 Plant Physiol. XI. 229 The transmittancies were obtained with a Bausch and Lomb visual spectrophotometer.

1959 H. Barnes Apparatus & Methods Oceanogr. i. 26 A calibration can then be set up relating transmittancy and concentration from which the concentrations of unknowns may be read when their transmittancies have been determined.

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021).

单词	transmittance
释义	transmittancen. Etymology: formed as transmit v. + -ance suffix: compare admittance.Previous versions of the OED give the stress as: transˈmittance. 1. The action of transmitting; transmission. rare. ΘΚΠ the world > movement > transference > [noun] > transmission or passing on communicationc1384 delation1578 transfusion1578 transmission1611 conveyance1646 transmitting1671 transmit1672 transmittal1735 transmittance1855 passage1860 transjection?1867 1855 in H. Clarke New Dict. Eng. Lang. ; and in later Dicts. 2. Physics. The ratio of the transmitted luminous flux to the incident luminous flux. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [noun] > rate, ratio transmittance1919 square law1921 luminosity1974 1919 Technologic Papers U.S. Bureau of Standards No. 119. 10 The transmittance T is defined as the fraction of radiant power transmitted by the first surface which is incident on the second surface. 1960 Illuminating Engin. 55 228/1 The concepts of transmittance and reflectance can be extended to cover the separation of specular and diffuse components which are functions of angles. 1980 Nature 29 May 313/1 We had to use a shorter path~length (970 m at Riverside and 750 m at Claremont) because of the poor optical transmittance of the polluted atmosphere at our observation sites. Derivatives transˈmittancy n. the ratio of the transmittance of a solution to that of a similar body of solvent. ΘΚΠ the world > matter > chemistry > physical chemistry > solutions > [noun] > transmittancy transmittancy1925 1925 Jrnl. Optical Soc. Amer. 10 177 (table) T_sol/T_sov = transmittancy. 1936 Plant Physiol. XI. 229 The transmittancies were obtained with a Bausch and Lomb visual spectrophotometer. 1959 H. Barnes Apparatus & Methods Oceanogr. i. 26 A calibration can then be set up relating transmittancy and concentration from which the concentrations of unknowns may be read when their transmittancies have been determined. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021). < n.1855
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