'Cloaking' idea traps a rainbow

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".

Source: http://www.bbc.co.uk/news/science-environment-18181201#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa

Adriana Lima Rihanna Pippa Middleton Paul