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Tag: “natural microwave radiation”

A replica of the prototype of the kilogram (Le Grand K) at the Cité des Sciences et de l’Industrie, Paris, France. (Japs 88/Wikimedia Commons/Attribution-ShareAlike 3.0 Unported)

Quantum Mechanics Will Be Used to Determine Weight and Measurement Standards

November 16, 2018

What makes a kilogram a kilogram? Since the late 19th century the standard, which a kilogram has been measured, has been based on a chunk of platinum-alloy, called Le Grand K, that’s held at the International Bureau of Weights and Measures laboratory in Sèvres, France. According to the Encyclopedia Britannica, a kilogram was originally intended […]

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