The International Prototype of the Kilogram or IPK is known as the fundamental mass unit in the international system of the unit. Scientists have implemented a new standardization of Kilogram on May 20, on World Metrology Day.
The original ingot cast in 1879 of platinum and iridium, the cylinder is kept in a triple-locked underground vault. It emerges in every 40 years to calibrate copies that are shared with other countries.
But the scientist claiming that using a physical substance as a unit of measurement may deteriorate its prototype stage of mass over time and changes might be seen with increases or decreases in the weight. And time consuming process for other countries to send their representative to France every time to compare with IPK.
The new definition developed is based on the constant of nature and more stable definition of the kilogram. It is defined as using a fixed value of the Planck constant — a number that relates a radio wave’s energy to its frequency — and maintained using a Kibble Balance. Here the mass is calculated by electrical force that counteracts the weight of kilogram on a machine called kibble balance.
The late Dr Bryan Kibble developed the machine at NPL. International Bureau of Weights and Measures will use it, along with national measurement institutes around the world.
With such system, we will get a better accurate result of any measurement and will be no longer having to compare blocks of platinum.
India too has adopted the new definition to measure kilogram including the one at New Delhi’s CSIR-National Physical Laboratory (NPL).