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Mass destruction
In November, scientists from more than 60 countries came together to redefine the kilogram, basic unit mass of the International System of Units (SI).
Previously, a kilogram was defined by the Le Grand K, a cylinder in platinum iridium that had to be replaced from time to time to ensure its accuracy. As of Monday, it is now defined by the relationship between energy and mass – and as this physics-based approach is inherently stable, experts believe that the new definition will improve the quality of science.
Future Proofed
The new definition will not change the meaning of a kilogram for most people. However, the physical cylinder used previously to define it would sometimes lose a few atoms, and this slight deviation could affect the scientific measures in a detrimental way.
But this will no longer be a problem now that a kilogram is defined as equal to the mass of 1.4755214 x 1040 photons, each with a frequency corresponding to a cesium atomic clock.
"The revised IS puts our measurement system under stress so that we are ready for any future technological and scientific breakthroughs such as 5G networks, quantum technologies and other innovations that we do not have. have not yet imagined, "said Richard Brown, head of metrology at the National Physical Institute Laboratory, said in a press release.
READ MORE: A whole new kilogram, based on quantum physics[[[[Science live]
More about the measurements: The metric system is about to get an early upgrade
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