Bad light stopped play

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 […]

Continue reading

The Beirut explosion shockwave

That was clearly a huge explosion. https://www.nzherald.co.nz/world/news/article.cfm?c_id=2&objectid=12354134 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 […]

Continue reading