THE MOST ACCURATE MEASUREMENT YET OF THE PLANCK CONSTANT , the number which describes the bundle-like nature of matter and energy at the atomic and subatomic levels, has been carried out by NIST physicists, instantly improving the accuracy of related fundamental constants (such as electron mass, proton mass, and Avogadro's number) and paving the way for a quantum-based definition of mass. Carrying out an experiment first proposed by Brian Kibble of the National Physical Laboratory in England (011-44-171-594-7845), a NIST group (Edwin Williams, 301-975-4206) determined Planck's constant, otherwise known as h, by using a "moving-coil watt balance," an apparatus with a kilogram mass connected to a metal coil in a magnetic field.
(a kilogram mass; connected; to a metal coil in a magnetic field) (an experiment; proposed; by Brian Kibble of the National Physical Laboratory; L:in England; T:first) (THE MOST ACCURATE MEASUREMENT YET OF THE PLANCK CONSTANT; instantly improving; the accuracy of related fundamental constants (such as electron mass, proton mass, and Avogadro's number) (a NIST group; determined; constant) (the number which describes the bundle-like nature of matter and energy at the atomic and subatomic levels; otherwise known; as h; by using a "moving-coil watt balance)
a kilogram mass an experiment THE MOST ACCURATE MEASUREMENT YET OF THE PLANCK CONSTANT a NIST group the number which describes the bundle-like nature of matter and energy at the atomic and subatomic levels
connected proposed instantly improving determined otherwise known
to a metal coil in a magnetic field
by Brian Kibble of the National Physical Laboratory L:in England T:first
the accuracy of related fundamental constants (such as electron mass, proton mass, and Avogadro's number
constant
as h by using a "moving-coil watt balance