US-based scientists to redefine a ‘Kilogram’

kibble-balance

To redefine how a kilogram is measured, researchers at the US-based National Institute of Standards and Technology have made their most precise determination yet of the Planck’s constant. The constant relates mass to electromagnetic energy. With this, scientists aim to change the standard reference of a kilogram from a 128-year-old physical artefact in France to a “more reproducible definition”.