2012年5月25日 星期五

BBC News - Home: 'Cloaking' idea traps a rainbow

BBC News - Home
The latest stories from the Home section of the BBC News web site.
thumbnail 'Cloaking' idea traps a rainbow
May 25th 2012, 08:02

A grid of 25,000 "invisibility cloaks" shows how to slow light down and spread out its constituent colours in an advance dubbed "trapping a rainbow".

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