The New & Improved Invisibility Cloak

In 2010, scientists created the first cloak that worked for three-dimensional objects against light nearly visible to humans. Still, the cloaked area was only 30 microns wide, or about one-third the width of a human hair. Now researchers have developed a cloak that can hide three-dimensional objects against red and green lasers and ordinary white light. Although the cloaked region they demonstrated is only three-quarters of an inch wide, “there is actually no limit on the size of the cloak,” researcher Shuang Zhang, a physicist at the University of Birmingham in England, told LiveScience.