Description: Electron diffraction patterns for single crystal and polycrystalline materials are displayed on a CRT screen. A Welch model 2639 'Electron Diffraction tube' is used in an experiment in ...

The emergence of imaging schemes capable of overcoming Abbe's diffraction barrier is revolutionizing optical microscopy. In 1873, the German physicist Ernst Abbe realized that the resolution of ...

Researchers from Hohai University have developed a data-driven model to enhance GNSS positioning accuracy by systematically analyzing error-inducing factors and leveraging machine learning techniques, ...

When waves meet a gap or an edge in a barrier, they continue through the gap or past the edge of the barrier. This may seem obvious but what happens on the far side of the gap or barrier is not so ...

More information: Zetao Fan et al, Planar device–enabled speckle illumination for dark-field label-free imaging beyond the diffraction limit, Proceedings of the National Academy of Sciences (2025).