Tagged: Einstein

Apparent weight? Apparently not - Physics Stop

Marcus Wilson Jul 08, 2011

Here's a thorny problem that no doubt every physics teacher has grappled with. In a space-station, orbiting the earth, are you weightless?  There are at least two ways of answering this:1. Yes, you are. Let's face it, you float around inside the space-station, water forms large blobs, some plants don't know which way up is, pendulums don't swing, and you need … Read More

Physicists on film - Physics Stop

Marcus Wilson May 17, 2011

Last night we went to the movies. We had free passes that needed using by the end of the week, so we turned up at Chartwell early evening without knowing what was showing. Not wishing to see a film about adultery, we decided against 'Water for Elephants' (or whatever it's called) and picked Thor. If you haven't seen this film, I've … Read More

What’s cooking at the LHC? - Physics Stop

Marcus Wilson Nov 01, 2010

I've just been perusing CERN's Twitter site http://www.twitter.com/cern for some of their latest news.While the Higgs is still hiding inside some time-travelling baguette, there's still some really nice physics arising. This example is one that caught my attention - it's the detection of a bound state made up of a beauty (or bottom) quark and … Read More

Happy Birthday - Physics Stop

Marcus Wilson Nov 06, 2009

PhysicsStop is one today!That means I'm a year older than I was when I wrote the first entry, give or take a few nanoseconds as a result of special and general relativistic effects while on aircraft journeys. Eeek.  … Read More

Anti-gravity - Physics Stop

Marcus Wilson Oct 28, 2009

There are some lovely physics demonstrations that get repeatedly wheeled-out for things like Open Day and visits from school groups. Things like holding a spinning bike wheel on a rotating chair (flip it over and you start rotating - conservation of angular momentum) and levitating a piece of superconductor above a magnet at liquid nitrogen temperatures.  But one thing that I've … Read More

Gravitational Waves - Physics Stop

Marcus Wilson Oct 20, 2009

One of my undergraduate students has been researching gravitational waves this year. Last Friday, he gave a nice presentation on the subject.Gravitational waves are one of the many examples of waves in physics. We are perhaps more used to waves on the surface of water, or waves along a guitar string, or electromagnetic waves (such as radio waves and light), and, … Read More

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