Feedback: Exhibiting quantum behaviour

Exhibiting quantum behaviour

READERS continue to send examples of signs that they feel instruct them to exhibit quantum behaviour. Dermot Bradley, in a caf? in Edinburgh, UK, was instructed to "queue both sides". In contrast, Mark Manning, visiting the beach at the Welsh village of Llangennith, was abjured "Strictly no parking on both sides of the road".

A mathematically eminent reader, meanwhile, tells Feedback that such signs, including the "use all doors" on a train (16 June 2007), do in fact make sense. We pondered this, and realised that, to the people writing the instructions, traffic - whether vehicular or passenger - is much like a gas. It is only when we, as individual "particles" in the traffic, "collapse" the meaning of the sign into an instruction to us personally, that confusion arises. Probably.

A sign near London Bridge station informs us that "Narrow lanes do not overtake ...

Source: http://feeds.newscientist.com/c/749/f/10897/s/1bfc9db9/l/0L0Snewscientist0N0Carticle0Cmg213284820B20A0A0Efeedback0Eexhibiting0Equantum0Ebehaviour0Bhtml0DDCMP0FOTC0Erss0Gnsref0Fonline0Enews/story01.htm

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