Dashing the dream of ideal ‘invisibility’ cloaks for stress waves
Credit: Creative Commons, https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Circular_EM_cloak_using_transformation_optics.svg/2000px-Circular_EM_cloak_using_transformation_optics.svg.png (2) Whether Harry Potter's invisibility cloak, which perfectly steers light waves around objects to make them ...