second radiation constant
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What is the Second Radiation Constant?
The second radiation constant, c_{2}, is used in Planck's law. It has the SI units of metres kelvin. It is given by the equation:
c_{2} = hc / k
where h is the Planck constant, c is the speed of light and k is the
Boltzmann constant. Its value is 1.438775x10^{-2} m K.
Planck's law gives the radiation intensity emitted by a black body for a given frequency and temperature. It has the form:
u = c_{1}.λ^{-5} / (ε^{c2/λT} - 1)