radiation constants

https://doi.org/10.1351/goldbook.R05051
Fundamental physical constants characterizing black body radiation. The first radiation constant is c1=2 π h c02=3.7417749(22)×10−16 W m2, the second is c2=h c0k=1.438769(12)×10−2 m K, where h is the Planck constant c0 the speed of light and k the Boltzmann constant.
Source:
CODATA Bull. 1986, 63, 1 [Terms] [Book]
Citation: 'radiation constants' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.R05051 RIS BibTex EndNote
CODATAPDFTextXMLJSONConstant