Definition:First Radiation Constant/Also defined as

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Definition

The first radiation constant is also seen defined as:

$c_1 = 8 \pi h c$

where:

$h$ denotes the Planck's constant
$c$ denotes the speed of light.

This can be obtained from the conventional definition of first radiation constant by multiplying it by $\dfrac {4 \pi} c$.



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Symbol

$c_1$

The symbol for the first radiation constant is $c_1$.


The $\LaTeX$ code for \(c_1\) is c_1 .


Dimension

The first radiation constant when defined as $8 \pi h c$ has the dimension $\mathsf {M L^3 T^{-2} }$.


Units

The SI unit for the first radiation constant when defined as $8 \pi h c$ is given as joule metres: $\mathrm {J \, m}$

The CGS unit for the first radiation constant when defined as $8 \pi h c$ is given as ergs centimetres: $\mathrm {erg \, cm}$


Value

The value of the first radiation constant when defined as $8 \pi h c$ is:

\(\ds c_1\) \(=\) \(\ds 8 \pi h c\)
\(\ds \) \(=\) \(\ds 4 \cdotp 99248 \, 2965 \ldots \times 10^{-24} \, \mathrm {J \, m}\)
\(\ds \) \(=\) \(\ds 4 \cdotp 99248 \, 2965 \ldots \times 10^{-15} \, \mathrm {erg \, cm}\)


Also see


Sources

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