Phot
A phot (ph) is a photometric unit of illuminance, or luminous flux through an area. It is not an SI unit but rather is associated with the older centimetre–gram–second system of units. The name was coined by André Blondel in 1921.
Metric equivalence:
1
p
h
o
t
=
1
l
u
m
e
n
c
e
n
t
i
m
e
t
r
e
2
=
10
,
000
l
u
m
e
n
s
m
e
t
r
e
2
=
10
,
000
l
u
x
=
10
k
i
l
o
l
u
x
{\displaystyle 1\ \mathrm {phot} =1\ {\frac {\mathrm {lumen} }{\mathrm {centimetre} ^{2}}}=10,000\ {\frac {\mathrm {lumens} }{\mathrm {metre} ^{2}}}=10,000\ \mathrm {lux} =10\ \mathrm {kilolux} }
Metric dimensions:
Illuminance = luminous intensity × solid angle / length2
Direct Oration
- 2020-11-13T00:00:00.000000Z
ADEPT ALUMNI
- 2018-08-27T00:00:00.000000Z
Sphotless
- 2017-10-30T00:00:00.000000Z
Similar Artists