The software 'sim-trhepd-rheed' is a simulator for total-reflection high-energy positron diffraction (TRHEPD) and reflection high-energy electron diffraction (RHEED).Please cite Ref. [1] and, if ...

The formation of a rainbow requires the observer to be between the sun and falling rain, with the rain in front and the sun behind. Sunlight passes from behind the observer, refracts as it enters each ...

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 ...

High-frequency signals, like those used in 5G communications, are reflected by impedance discontinuities. Their shorter wavelengths can change their impedance. When a signal arrives at an impedance ...

Amidst the chaos that leaders have to deal with in keeping up with responsibilities and deadlines, there exists a profound and transformative tool that often goes overlooked: The power of ...

VHF is widely used in broadcasting, voice and data communications, avionics, and even some types of radar, but there is a widely held misconception that most VHF propagation is simply “line of sight.” ...

"The colors of the spectrum, then, "are not Qualifications [alterations] of Light … (as 'tis generally believed), but Original and connate properties." When you purchase through links on our site, we ...

Directly reconstruct the electron density and the deviatoric lattice distortion in compact crystals from independent BCDI data sets measured at a synchrotron facility. Useful for imaging isolated ...

Negative reflection and negative refraction are exotic phenomena that can be achieved by platforms such as double-negative metamaterial, hyperbolic metamaterial, and phase-discontinuity metasurface.