Definition of kilogram changed after nearly 130 years


Scientists have unanimously voted to redefine kilogram, retiring the platinum alloy cylinder conceived in Paris in 1889. Redefined by the Planck constant, the new system determines the unit of mass through the electrical force needed to counteract the weight of a kilogram on a Kibble balance. The changes will come into effect from May 20, 2019, World Metrology Day. However, it’s not going to change anything on the basic level. Like for normal people, Kilogram will remain the same but for scientific purposes, it will be really helpful in providing extra accuracy.