Chemistry Reference
In-Depth Information
lanolin
A
fat
that naturally covers
wool fibers
.
laser
A devices that creates highly concentrated and directional beams of
light
; the
word
laser
is an acronym for
light amplification by stimulated emission of radiation
.
laser-induced breakdown spectroscopy (LIBS)
See
spectroscopy, laser-induced
breakdown
.
late wood
See
wood, late.
lattice, crystal
See
crystal structure
.
lava
Molten
magma
released from a volcano.
leaching
The removal of
soluble
components from
solid matter
by percolating water.
lead glass
See
glass, lead
.
leaf fibers
See
hard fibers
.
leaf, metal
See
metal leaf
.
leather
The generic name for
tanned
animal
hide
or
skin
.
leather hard
The condition of a
ceramic body
from which most of the
water of
plasticity
has evaporated.
leuko compound
A colorless (and
reduced
) transient form of a
vat dye
from which
the original
color
of the dye can be regenerated by
oxidation
.
levigation
A method for separating fine from coarse
particles
, such as those of
clay
,
by mixing a powdered
solid
with a
liquid
, usually water, and then allowing the
particles to settle; the coarser particles settle first.
LIBS
Acronym for
laser-induced breakdown spectroscopy
.
light
A form of
electromagnetic radiation
that makes things visible; see
visible light.
light intensity
The amount of
light
per unit area falling on a surface.
light interference
The interaction between
light waves
traveling in the same
medium.
light reflection
The turning back of a beam of
light
when striking the surface of a
medium
that it does not penetrate.
light scattering
The physical process in which light is deflected and haphazardly
dispersed as a result of collisions with particles.
light transmission
The passing of
light
through a
medium
.
light, transmitted
Light that passes through a transparent or
translucent
medium.
light, visible
Electromagnetic radiation
with
wavelengths
ranging between 4.0
×
10
−7
10
−7
m, that is, extending from red, through orange, yellow, green, blue,
indigo, to violet.
lignin
A
biopolymer
that, together with
cellulose
, is a major constituent of
wood
and
straw.
lignite
A brownish black sort of
coal
formed from the decay of ancient
wood
in
which the texture of the original
wood
is often recognizable; it is used as
fuel
.
lime
and 7.5
×
Calcium oxide.
