Physics Stop

Scholarship Physics

Marcus Wilson Oct 16, 2020

It’s that time of year when school students become seriously focused on exams. This year has been messy for student learning, and has affected some students more than others, but the NCEA external assessments and the Scholarship exams are going ahead pretty-much as normal. I’ve taken some interest in the Scholarship Physics exams over the past years. Read More

Bad light stopped play

Marcus Wilson Aug 26, 2020

One of the top challenges for physics in the modern era, along with Climate Change and explaining Dark Energy, has to be fixing the problem of bad light*. (I’m talking cricket – what else?) It’s a quintessentially English problem. It’s not raining, the pitch is perfectly playable, the spectators (COVID-19 notwithstanding) are enjoying themselves, but the umpires bring the … Read More

The Beirut explosion shockwave

Marcus Wilson Aug 06, 2020

That was clearly a huge explosion. Just after the explosion, we see a cloud of ‘fog’ moving outwards at high speed. This is a shockwave, rather similar to that which causes a sonic boom. The ‘fog’ is caused by water condensing from the atmosphere in areas of intense low pressure and temperature, and parallels the sonic boom cloud, or … Read More

All-pervading Waikato dampness

Marcus Wilson Jul 17, 2020

Yesterday we arrived back in Cambridge after a few days holiday in Auckland, being tourists. We sampled such delights as the unheated hotel swimming pool,  the complicated and expensive process of getting on a bus (basically having to find somewhere from which to buy a HOP card, for a non-refundable $10 a card), the completely non-social distanced pedestrian rugby scrum … Read More