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first radiation constant
constant in Wien's radiation law
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Statements
instance of
physical constant
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part of
Wien approximation
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ISQ dimension
L
4
M
T
−
3
{\displaystyle {\mathsf {L}}^{4}{\mathsf {M}}{\mathsf {T}}^{-3}}
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numeric value
0.0000000000000003741771852
watt square metre
1 reference
stated in
2018 CODATA recommended values
defining formula
c
1
=
2
π
h
c
2
{\displaystyle c_{1}=2\pi hc^{2}}
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in defining formula
c
1
{\displaystyle c_{1}}
symbol represents
first radiation constant
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h
{\displaystyle h}
symbol represents
Planck constant
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c
{\displaystyle c}
symbol represents
speed of light in vacuum
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π
{\displaystyle \pi }
symbol represents
pi
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quantity symbol (LaTeX)
c
1
{\displaystyle c_{1}}
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maintained by WikiProject
WikiProject Mathematics
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different from
first radiation constant for spectral radiance
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Identifiers
NIST/CODATA ID
c11strc
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Wolfram Language unit code
"FirstRadiationConstant"
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Sitelinks
Wikipedia
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enwiki
First radiation constant
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