tag:blogger.com,1999:blog-11109375.post8246690516572227916..comments2023-06-01T03:41:01.688-06:00Comments on Over the Edge: Hide in Plain Light: The Science of Over the EdgeMarilyn W Lathrophttp://www.blogger.com/profile/04952639271241863982noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-11109375.post-42196382035573831802009-08-28T17:26:31.725-06:002009-08-28T17:26:31.725-06:00"Transformation optics" reported by the ..."Transformation optics" reported by the "UK Telegraph" www.telegraph.co.uk/science/science-news/6016857/Invisible-d... alters light pathways to create portals invisible to the human eye. This technique pushes the laws of refraction and reflection to the limit. <br /><br />The team from Hong Kong Univeristy and Fudan University in Shanghai describe the concept of a "gateway" blocking electromagnetic waves, but allowing other entities to pass. Using transformation optics and a "superscatterer" made from photonic crystals, they've created an optical illusion forcing light and other forms of electromagnetic radiation into complicated directions to hide an opening. <br /><br />This new technique can be switched on and off. <br /><br />Dr. Huanyang Chen, Physics Department, Hong Kong, said, "people standing outside the gateway would see something like a mirror." <br /><br />Before this technology can be employed, many practical issues remain.Anonymousnoreply@blogger.com