Napkin with Planck's Constant Guesses (IMAGE)

National Institute of Standards and Technology (NIST)

Napkin with Planck's Constant Guesses

Caption

In December 2013, before NIST began its experiments on its newest Kibble balance, group members wrote their predictions on the value of Planck's constant they would measure. Shisong Li, a guest researcher from Tsinghua University in China, came closest. His prediction differed by only about 5 parts per billion from the measured result.

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NIST

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