Photometric counterpart of
radiance, producing the visual sensation called
brightness. Typical units are:
(
),
(
),
(
).
As with all photometric quantities, luminance does not refer to a specific
wavelength, but applies to light emitted by a standard source (formerly a '
standard international candle', now a blackbody radiator
emitting at the temperature of solidifying platinum,
).
Conversion from photometric units to radiometric units
(e.g.
)
requires convolution over
wavelength of the relative spectral response of the human eye (photopic response tables).
Source:
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2199
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
