
48-6 Optical
radiator is a theoretically perfect emitter and absorber of radiation that changes color like the carbon
bl
ock
ju
st
de
scribed
. e co
lor
te
mperature
of a li
ght
so
urce
is th
e
te
mperature
of a fu
ll
ra
diator
th
at
ha
s
th
e
sa
me
co
lor
as th
e
li
ght
so
urce
. Wh
en
a li
ght
so
urce
do
es
no
t
ex
actly
ma
tch
th
e
co
lor
of a fu
ll
ra
diator,
th
e
co
rrelated
co
lor
te
mperature
is us
ed
to de
scribe
th
e
li
ght
so
urce
. e co
rrelated
co
lor
te
mperature
is th
e
t
emperature
o
f
a f
ull
r
adiator
w
hose
c
olor
i
s
c
losest
to t
he
s
ource
.
Da
ylight
va
ries
du
ring
th
e
da
y—redder
in th
e
mo
rning
an
d
ev
ening
an
d
bl
uer
at no
on
. Av
erage
da
y-
light
(d
iuse
sk
ylight
wi
thout
di
rect
su ...