Ripples of light might make you invisible

日期:2019-03-03 08:07:01 作者:扈劭 阅读:

By Jenny Hogan EVER envied the protagonist in H. G. Wells’s classic The Invisible Man? Or Kevin Bacon in Hollow Man? Now there is a way you too can make yourself invisible – but only if you are much smaller than a pinhead. Nader Engheta and Andrea Alù from the University of Pennsylvania in Philadelphia claim that a special coating can make a solid object “nearly invisible to an observer” (www.arxiv.org/cond-mat/0502336). But the coating works only with wavelengths of light about the same size as the object that you want to disappear. Unfortunately,