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#Mon Aug 09 12:00:48 CEST 2010
Text__-36hkKOcEd-WfYQ0GneCwQ_text=<p>In 1875, William Crookes constructs a rotor whose vanes are set in motion by light. He calls his light mill a <q>radiometer</q> and initially explains the effect as a consequence of the <q>ether waves</q> of light, but soon recognizes that gas in the bulb plays a role as well. Even in Einstein\u2019s time, this role still has not been explained completely.</p>
Text__-36hkKOcEd-WfYQ0GneCwQ_title=Light Moves a Mill