Scientists have demonstrated that negative refraction can be achieved using atomic arrays -- without the need for artificially manufactured metamaterials. Scientists have long sought to control light ...

The negative refraction of electrons in graphene has been seen for the first time in experiments done by physicists in the US. The work represents an important advance in the fabrication of graphene ...

Although the concept of negative-index materials (NIMs) has existed for several decades, actual metamaterials with these properties were not fabricated until recently 1,2,3. The original proposal and ...

Figure 1: Comparison of positive and negative refraction. We made transmission measurements to confirm our structure's predicted negative refraction, using the interfaces of the photonic crystal in ...

An unusual optical phenomenon explains why the Titanic struck an iceberg and received no assistance from a nearby ship, according to new research by British historian Tim Maltin. Atmospheric ...

There are different ways to investigate refraction in rectangular blocks. In this required practical activity, it is important to: make, measure and record the angles of incidence accurately using a ...