单词	Geiger counter
释义	Geiger counter /ˈɡʌɪɡə kaʊntə / (also Geiger-Müller counter) noun A device for measuring radioactivity by detecting and counting ionizing particles.The Geiger counter, a device used to detect the presence of radioactivity, works on this principle.... Pipes and other kinds of containers can be filled with radon gas and then checked with a Geiger counter or other detection device. These arcs emit light high in the ultraviolet, as well as centimeter-wavelength sound, which together with the intense electromagnetic perturbations produced are particularly effective in activating the Geiger counters.
随便看	plastron -plasty plat Plataea, Battle of platan platanna platano platanus platband platch plat du jour plate platea plate appearance plate armour plateau plateau basalt plateau gravel plateau green plateau phase plate-bande plate-bone plate camera plate clutch plate count

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