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Redefining the Kilogram, the Kelvin, the Ampere and the Mole: Why you should care even though you won't notice.

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19:30 – 21:00 19 Mar 2019
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Sarum College, 19 The Close, Salisbury, Wiltshire, UK, SP5 3AL

Speaker:  Dr. Michael de Posta, (National Physical Laboratory)

Progress in science and engineering is often linked to progress in metrology. If we cannot measure something then we cannot begin to understand it (science) or improve it (engineering). And better measurement leads to better understanding and control. Measurement is the quantitative comparison of an unknown quantity with a standard. In the International System of Units - the 'SI' - there are seven standard quantities called the 'base units': the second, metre, kilogram, ampere, kelvin, candela and mole. The perfection with which these definitions can be made real, represents a fundamental limit to achievable measurement uncertainty. In order to remove these limits, from May 2019 there will be subtle but profound changes in the definitions of four of these base units - the kilogram, ampere, kelvin and mole. In this talk Michael de Podesta will explain the rationale for the forthcoming changes and why, even though you are unlikely to personally or professionally notice any changes, you should be happy about them.


Contact:  djw_iop@hotmail.com

Venue information:

  • Wheeelchair access
  • Car Park
  • Coffee and Tea from 19:00

 Figure: © National Physical Laboratory

 

Organised by: IOP South West Branch

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Location icon
Sarum College, 19 The Close, Salisbury, Wiltshire, UK, SP5 3AL
Clock icon
19:30 – 21:00 19 Mar 2019

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