A two year exercise in patience, care and precision measurement has produced a silicon sphere which is in the running to become the world's standard kilogram. In this podcast, CSIRO’s Master Optician, Achim Leistner describes this once in a lifetime search for perfection. (4.09)
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One of the roundest balls in the world set to become an international standard (Podcast 21 Apr 08)
Posted: April 20th, 2008, 7:00am PDT
Enclosure: [download]