For 130 years, this golf-ball-sized hunk of 90% platinum and 10% iridium has served as the international prototype kilogram. But, starting Monday, the kilogram will be redefined by a fundamental property of nature known as Planck’s constant.
The watt balance enables researchers to determine the mass of an object indirectly.
“One experiment could have a hidden defect, but if you have two absolutely different approaches and they agree, then the chances that you are completely wrong is very low indeed,” saidKibble balances provided one value. The other measurement involved a softball-sized sphere of pure enriched silicon.
“Everyone has access to these fundamental constants,” Schlamminger said. “They don’t discriminate between rich and poor. All you need is a bit of physics.” “If we make contact with aliens, what are we going to talk to them about? Physics. There is nothing else,” Schlamminger said. “But if you tell aliens that our units of measurement are based on a hunk of metal, you will be the laughingstock of the galaxy.”
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