| 单词 | Roentgen |
| 释义 | Roentgen or Röntgen (ˈrɒntɡən, -tjən, ˈrɛnt-; German ˈrœntɡən) noun Wilhelm Konrad (ˈvɪlhɛlm ˈkɔnraːt). 1845–1923, German physicist, who in 1895 discovered X-rays: Nobel prize for physics 1901 roentgen or röntgen (ˈrɒntɡən, -tjən, ˈrɛnt-) noun a unit of dose of electromagnetic radiation equal to the dose that will produce in air a charge of 0.258 × 10–3 coulomb on all ions of one sign, when all the electrons of both signs liberated in a volume of air of mass one kilogram are stopped completely Symbol: R, r Word origin C20: named after W. K. Roentgen |
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