Labels: text | screenshot | plaque OCR: GEIGER COUNTER The gas ions then become electrically conducting and the resulting current passes between the two electrodes. The route of current is displayed by the twitch of a needle, a pulse of light, or a clicking sound in earphones. One of the great advantages of the geiger counter is that it is extremely sensitive, so much in fact, it can detect the course of a single atomic particle. FINISH
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