lambert
American Heritage Dictionary:
Top
lam·bert
(lăm'bərt) 
n. (Abbr. L)
The unit of brightness in the centimeter-gram-second system, equivalent to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter.
n. (Abbr. L)
The unit of brightness in the centimeter-gram-second system, equivalent to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter.
[After Johann Heinrich Lambert (1728-1777), German physicist and astronomer.]
Related Videos:
Top
lambert
Top
[Etymology: J. H. Lambert; Germany 1728-77] luminance, irradiance. Symbol L. Metric-c.g.s. 1920 For a point on a diffuser, identically candela·steradian per square centimetre = cd·sr·cm-2, = 104 cd·sr·m-2 = 104 lm·m-2. (The corresponding m.k.s. unit was the apostilb, = 10-4 L. There is no corresponding specially named unit in the SI, but the lux or illuminence has the same basic dimensions as the apostilb.) For a perfect diffuser, 1 L corresponds to the emission of 1/4π cd·cm-2, = 0.318 3~ cd·cm-2, = 0.318 3~ stilb. The millilambert (mL) was usual.
A unit of luminance equal to (1/π) candela per sq cm; equal to the uniform luminance of a perfectly diffusing surface emitting or reflecting light at the rate of 1 lumen per sq cm. Abbr. L.
See crossword solutions for the clue Post a question - any question - to the WikiAnswers community:
Copyrights:
American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
Read more
Oxford Dictionary of Units & Measures
A Dictionary of Weights, Measures, and Units. Copyright © Donald Fenna 2002, 2004. All rights reserved.
Read more
McGraw-Hill Dictionary of Architecture & Construction
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc. All rights reserved.
Read more
Mentioned in
Lumbert
(family name)
fL
(abbreviation)
Lamberth
(family name)
Lambertson
(family name)
Lamport
(family name)
» More