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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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I was one of the 75 teachers who logged in last night, courtesy of the IoP + ISTA to hear Raghnall Quinn generously give up his time to share his insights into the marking schemes for this year’s pap

As has happened for a number of years, the IoP and The ISTA are joining foces next Tuesday to organise a session where Raghnall Quinn, an experienced marker of Leaving Certificate Physics papers, will