spectrum 音标拼音: [sp'ɛktrəm]
n . 光谱,范围,系列
光谱,范围,系列
spectrum 频谱
spectrum 频谱
spectrum n 1 :
an ordered array of the components of an emission or wave 2 :
a broad range of related objects or values or qualities or ideas or activities Spectrum \
Spec "
trum \,
n .;
pl . {
Spectra }. [
L .
See {
Specter }.]
1 .
An apparition ;
a specter . [
Obs .]
[
1913 Webster ]
2 . (
Opt .)
(
a )
The several colored and other rays of which light is composed ,
separated by the refraction of a prism or other means ,
and observed or studied either as spread out on a screen ,
by direct vision ,
by photography ,
or otherwise .
See Illust .
of {
Light },
and {
Spectroscope }.
(
b )
A luminous appearance ,
or an image seen after the eye has been exposed to an intense light or a strongly illuminated object .
When the object is colored ,
the image appears of the complementary color ,
as a green image seen after viewing a red wafer lying on white paper .
Called also {
ocular spectrum }.
[
1913 Webster ]
{
Absorption spectrum },
the spectrum of light which has passed through a medium capable of absorbing a portion of the rays .
It is characterized by dark spaces ,
bands ,
or lines .
{
Chemical spectrum },
a spectrum of rays considered solely with reference to their chemical effects ,
as in photography .
These ,
in the usual photogrophic methods ,
have their maximum influence at and beyond the violet rays ,
but are not limited to this region .
{
Chromatic spectrum },
the visible colored rays of the solar spectrum ,
exhibiting the seven principal colors in their order ,
and covering the central and larger portion of the space of the whole spectrum .
{
Continous spectrum },
a spectrum not broken by bands or lines ,
but having the colors shaded into each other continously ,
as that from an incandescent solid or liquid ,
or a gas under high pressure .
{
Diffraction spectrum },
a spectrum produced by diffraction ,
as by a grating .
{
Gaseous spectrum },
the spectrum of an incandesoent gas or vapor ,
under moderate ,
or especially under very low ,
pressure .
It is characterized by bright bands or lines .
{
Normal spectrum },
a representation of a spectrum arranged upon conventional plan adopted as standard ,
especially a spectrum in which the colors are spaced proportionally to their wave lengths ,
as when formed by a diffraction grating .
{
Ocular spectrum }.
See {
Spectrum },
2 (
b ),
above .
{
Prismatic spectrum },
a spectrum produced by means of a prism .
{
Solar spectrum },
the spectrum of solar light ,
especially as thrown upon a screen in a darkened room .
It is characterized by numerous dark lines called Fraunhofer lines .
{
Spectrum analysis },
chemical analysis effected by comparison of the different relative positions and qualities of the fixed lines of spectra produced by flames in which different substances are burned or evaporated ,
each substance having its own characteristic system of lines .
{
Thermal spectrum },
a spectrum of rays considered solely with reference to their heating effect ,
especially of those rays which produce no luminous phenomena .
[
1913 Webster ]
175 Moby Thesaurus words for "
spectrum ":
AF ,
CPS ,
Dalmatian ,
EHF ,
HF ,
Hz ,
Indian file ,
MF ,
Maxwell triangle ,
Munsell scale ,
RF ,
SHF ,
UHF ,
VHF ,
VLF ,
afterimage ,
antigorite ,
array ,
articulation ,
audio frequency ,
bank ,
bogey ,
butterfly ,
buzz ,
candy cane ,
carrier frequency ,
carry ,
catena ,
catenation ,
chain ,
chain reaction ,
chaining ,
chameleon ,
cheetah ,
chromatic circle ,
chromatic spectrum ,
chromaticity diagram ,
chrysotile ,
color circle ,
color cycle ,
color index ,
color mixture curve ,
color solid ,
color spectrum ,
color system ,
color triangle ,
compass ,
complementary color ,
concatenation ,
confetti ,
connection ,
consecution ,
continuum ,
course ,
crazy quilt ,
cycle ,
cycles ,
demitint ,
descent ,
diapason ,
drone ,
eidolon ,
endless belt ,
endless round ,
extremely high frequency ,
file ,
filiation ,
firedog ,
frequency ,
frequency spectrum ,
full color ,
fundamental colors ,
gamut ,
ghost ,
gradation ,
half tint ,
halftone ,
harlequin ,
haunt ,
hertz ,
high frequency ,
hue cycle ,
hum ,
intermediate frequency ,
iris ,
jaguar ,
kilocycles ,
kilohertz ,
leopard ,
line ,
lineage ,
low frequency ,
lower frequencies ,
mackerel ,
mackerel sky ,
marble ,
marbled paper ,
medium frequency ,
megacycles ,
megahertz ,
metamer ,
moire ,
monochrome ,
monotone ,
mother -
of -
pearl ,
nacre ,
nexus ,
ocelot ,
ocular spectrum ,
opal ,
ophite ,
optical illusion ,
patchwork quilt ,
peacock ,
pendulum ,
periodicity ,
phantasm ,
plenum ,
powder train ,
primary ,
primary color ,
progression ,
pure color ,
queue ,
radio frequency ,
radius ,
rainbow ,
range ,
rank ,
reach ,
recurrence ,
register ,
reticulation ,
revenant ,
rotation ,
round ,
routine ,
row ,
run ,
scale ,
scope ,
secondary ,
secondary color ,
sequence ,
series ,
serpentine ,
serpentine marble ,
shade ,
shot silk ,
single file ,
solar spectrum ,
spark frequency ,
spectral color ,
spectrum color ,
spirit ,
spook ,
stretch ,
string ,
succession ,
superhigh frequency ,
swath ,
sweep ,
tertiary ,
tertiary color ,
thread ,
tier ,
tortoise shell ,
train ,
trick of eyesight ,
ultrahigh frequency ,
upper frequencies ,
very high frequency ,
very low frequency ,
windrow ,
zebra
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