Search
The Online Encyclopedia and Dictionary
Encyclopedia
Dictionary
Quotes
Lumen
In
anatomy
, the
lumen
is the cavity or channel within a tube or tubular structure, such as the vascular lumen of a
blood vessel
, along which
blood
flows.
In
astronomy
,
141 Lumen
is the name of an
asteroid
discovered by the French
astronomer
Paul Henry
in 1875.
In
physics
, specifically
photometry (optics)
, the
lumen
(symbol:
lm
) is the
SI derived unit
of
luminous flux
. It is the amount of
light
that falls on a unit area at unit distance from a source of one
candela
.
See also:
Lux
.
The contents of this article are licensed from
Wikipedia.org
under the
GNU Free Documentation License
. How to see
transparent copy
