The kilogram got redefined. Instead of using the previous base weight, the new measurement system is based on the unchanging laws of physics.
The decision to overhaul the way we previously understood the kilogram was made at 2018's General Conference on Weights and Measures in Versailles and put into practice in 2019.Metrology - the science of measurement - is critical to all other branches of science. It dictates how we understand and observe our world and its critical to have a precise and constant measurement system so that the scientist across the world can work in synch and share knowledge.
The new changes affect not only the kilogram but the ampere , kelvin , and mole . Each of these and the kilogram got a new method of measurement that uses the laws of physics.believe that a more constant and stable measurement can be achieved around the globe. Currently, distance is used in physics to determine its exact length. An official meter is the distance light travels in a vacuum in 1/299792458 of a second.
Until the big update, a kilogram was well, a kilogram. Literally, a chunk of material that all other kilograms were determined by. The official kilogram was made from 90 percent platinum and 10 percent iridium and was formed in 1889. It is housed under super strict conditions in a special vault in the BIPM headquarters. There are copies of the official kilogram in various parts of the world to help scientists locally get an accurate measure. But this pretty archaic system has been changed.
But don’t stress if that all seems a little complicated. The change in kilogram can't affect your Jenny Craig status. In fact, it can't affect your daily life at all. But for the future of precise and constant scientific experimentation - this was a verystep forward indeed. The change officially came into force on World Metrology Day which fell on May 20, 2019.
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