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#Mon Aug 09 12:00:46 CEST 2010
Text__3bi2oKOcEd-WfYQ0GneCwQ_text=<p>In 1928, Hans Geiger and Walther M\u00FCller invent a detector for radioactive rays. A metal cylinder contains a rarefied noble gas and an electrode at high voltage. Every particle that strikes an atom of the noble gas triggers a momentary surge.</p>
Text__3bi2oKOcEd-WfYQ0GneCwQ_title=Geiger-M\u00FCller Tube