EU: WATT_PER_SQ_METRE_SR
Status:
STD 2005/06/07
Code:
238
Symbol:
W/(m
2
· sr)
EQ label:
RADIANCE
Quantities associated with this Unit
Quantity:
radiance
Concept definition:
At a point on a surface and in a given direction, (d
I
/d
A
) (1/cos α), where d
I
is the radiant intensity [
ISO 80000-7:2008
, item 7-14] emitted from an element of the surface with area d
A
[
ISO 80000-3:2006
, item 3-3] and angle α is the angle between the normal to the surface and the given direction.
1
W
/(
m
2
·
sr
) = 1
kg
/(
s
3
·
sr
).
Reference type:
PR
Reference:
[
ISO 80000-7:2008
, item 7-15.a]
Supplemental references:
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