From Physics in the Pub 2016, a great set from Leon Twardy about sound waves, how microphones work, and how an acoustic guitar steals energy from the future.
The Rubens Tube is a really complicated demo that seems simple. Once you start thinking about it you realise that sound antinodes are points of oscillating pressure, so the flames shouldn’t be stable peaks – they should be going up and down at the frequency of the wave!
And if you change the gas pressure a lot the nodes and antinodes reverse position! Wish I’d thought these points through before Derek asked me to film this!
Fiona Panther is searching out galaxy for antimatter – no it’s not science fiction, she’s after anti – electrons, called positrons. It’ll help her to study supernovae – exploding stars.
Fi is a PhD student at ANU Research School of Astronomy and Astrophysics, Mt Stromlo.
Filmed at Physics in the Pub, 2016, Smith’s Alternative. Supported by Australian Institute of Physics and National Science Week.
We know PhD students like to do things on the cheap… well Ryan Ridden-Harper is doing high altitude astronomy – like the Hubble space telescope – but with no expensive satellite, just a weather balloon. He hopes it will give nice cheap insights into dark energy!
A surprise find of blue wine in the washing up opened up a world of chemistry in the kitchen.
Turns out red wine and purple cabbage show amazing colours as you change their acidity. They are acid-base indicators, due to chemicals called anthocyanins.
I had the honour to interview David Reitze, one of the leaders in gravitational wave physics, when he visited Canberra earlier this year.
Bit surprised he wasn’t one of the Nobel laureates… but anyway, ahead of the exciting announcement tomorrow, (what have they found this time?!), here’s the interview.
And for those who just want the highlights:
Some lovely footage of superconductors weaving their magical levitation spell
One from the archives from Eurofusion.
If you’re lazy like me then putting the washing away is like the Geiger-Marsden experiment.
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It’s not like we planned this out very well…
TFW the silliest stories go better than you want…