Bending light over backwards

2019-03-07 08:07:08

By Hazel Muir AN INGENIOUS new material announced this week looks set to turn some everyday physics on its head and open the way to entirely new kinds of electronic components. In 1968, the Russian physicist Victor Veselago worked out how an imaginary material would behave if it had negative values for its permeability and permittivity—properties that measure how much a material modifies magnetic and electric fields. Veselago showed the material would bend, or refract,