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Transmittance
(
T
=
P
transmitted
/
P
incident
)
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2026-10-14
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Transmittance
is the
fraction
of incident
radiant flux
transmitted through
a
specified object or boundary. Specify
wavelength
,
angle of incidence
,
electromagnetic polarization
and which outgoing
light
is collected.
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Transmittance
by
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Transmittance
is
a
measure
of the
fraction
of incident
light
or
radiation
that passes through
a
material. It is defined
as
the
ratio
of the intensity of transmitted
light
(\(
I
_
t
\)) to the intensity of incident
light
(\(
I
_
0\))
: \[
T
= \frac{
I
_
t
}{
I
_
0
} \] where \(
T
\) represents
transmittance
.
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