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<http://webisa.webdatacommons.org/342813744>	<http://www.w3.org/ns/prov#value>	"If O is a source of light and A and B are mirrors placed a meter away from O, the Michelson-Morley experiment shows that the time taken for light to travel to A and back is the same as for the light to travel to B and back, in spite of the fact that the whole apparatus is moving through space in the direction of O???B, due to the earth's motion around the sun." .
<http://webisa.webdatacommons.org/342813744>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wikisource.org> .
<http://webisa.webdatacommons.org/prov/516245497>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/342813744> .