| 单词 | Stefan's law |
| 释义 | Stefan's law(Stefan-Boltzmann law) The total energy radiated per unit surface area of a black body in unit time is proportional to the fourth power of its thermodynamic temperature. The constant of proportionality, the Stefan constant (or Stefan-Boltzmann constant ) has the value 5.6697 × 10-8 J s-1 m-2 K-4. The law was discovered by the Austrian physicist Joseph Stefan (1853–93) and theoretically derived by Ludwig Boltzmann |
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