A ray diagram showing refraction at the boundary between air and glass Refraction can cause optical illusions as the light waves appear to come from a different position to their actual source.

Unlike a sound waves, light waves do not need a medium ... The diagram shows refraction of light passing into, and then out of, a glass block. The same would happen for a Perspex block or for ...

For the first time, scientists have demonstrated that negative refraction can be achieved using atomic arrays - without the ...

Scientists have found a way to achieve negative refraction—where light bends the "wrong" way—using carefully arranged atomic ...

Researchers have developed a novel metasurface-based method to generate terahertz complex vector light fields using surface ...