| 释义 |
Plancks constant
Planck's′ (or Planck′) con′stant,
n. a unit used in quantum mechanics that equals the ratio of the energy of a quantum of radiation to the frequency of the radiation, approximately 6.626 x 10-34 joule second. Symbol: h [1905–10; after M. K. E. Planck] EncyclopediaSeePlanck constantThesaurusSeePlanck's constant |