photometry
Americannoun
-
the measurement of the intensity of light or of relative illuminating power.
-
the science dealing with such measurements.
noun
-
the measurement of the intensity of light
-
the branch of physics concerned with such measurements
-
The measurement of the intensity, brightness, or other properties of light.
-
Also called photometrics
-
See also luminous intensity
Other Word Forms
Etymology
Origin of photometry
From the New Latin word photometria, dating back to 1815–25. See photo-, -metry
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Sirius is the most conspicuous star in the sky; it sends to the earth eleven times as much light as Aldebaran, the unit standard adopted in the revised Harvard Photometry; numerically its magnitude is -1.6.
From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 2 "Camorra" to "Cape Colony" by Various
Masson, with the title, Studies of Electrical Photometry.
From The International Monthly, Volume 2, No. 4, March, 1851 by Various
The magnitudes assigned to the stars in the diagrams are derived from the Harvard Photometry.
From A Field Book of the Stars by Olcott, William Tyler
The Harvard Photometry of 4260 lucid stars was issued by Professor E.C.
From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" by Various
All the bright stars of both the northern and the southern skies are worked into a standard system of magnitudes known as HP, or the Harvard Photometry.
From Astronomy: The Science of the Heavenly Bodies by Todd, David Peck
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
