Definition:First Radiation Constant/Also defined as/Value
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First Radiation Constant: Value
The value of the first radiation constant when defined as $8 \pi h c$ is:
| \(\ds c_1\) | \(=\) | \(\ds 8 \pi h c\) | ||||||||||||
| \(\ds \) | \(=\) | \(\ds 4 \cdotp 99248 \, 2965 \ldots \times 10^{-24} \, \mathrm {J \, m}\) | ||||||||||||
| \(\ds \) | \(=\) | \(\ds 4 \cdotp 99248 \, 2965 \ldots \times 10^{-15} \, \mathrm {erg \, cm}\) |
Sources
- 1964: Milton Abramowitz and Irene A. Stegun: Handbook of Mathematical Functions ... (previous) ... (next): $2$. Physical Constants and Conversion Factors: Table $2.3$ Adjusted Values of Constants
- which gives the mantissa as $4 \cdotp 992 \, 579$, with an uncertainty of $\pm 38$ corresponding to the $2$ least significant figures