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Changing Constants

It looks likely that the kilogram will be redefined in November. It is the last fundamental constant to be defined by a physical artefact - the kilogram prototype stored for many years in Paris. Its obviously about time, but its also a little sad to lose a link like this with the past.

the Ampere looks set to be redefined too. A prospect about which I feel no regret whatsoever.


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Lab Days 2022

The PDST are organising three lab-days for the spring (Covid allowing....) In the past these were an annual event, designed to help us all make the most of what facilities we have to let students bec