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 ...

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 ...

This paper describes a method for computing atmospheric refraction that is simple, highly accurate, and usable for wavelengths λλ3000-10,000 Å. When compared with the Refraction Tables of the Pulkovo ...