In 1982, materials scientist Dan Shechtman observed an unusual tenfold symmetry in an aluminum-manganese alloy, defying the ...

Loeb says optical effects may be behind some of the most discussed images in the first release of government UFO files.

X-ray diffraction (XRD) is a powerful non-destructive analytical technique used to evaluate crystalline materials and determine their structural properties. As one of the most widely used ...

Abstract: This paper describes diffraction-pattern sampling as a basis for automatic pattern recognition in photographic imagery; it covers: diffraction-pattern ...

Optical dispersion occurs when the refractive index of a material changes with the wavelength of incoming light. This variation causes different colors to move at different speeds in transparent media ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

Centuries of study have refined theories of how substances with periodically ordered structures behave. Anna Demming talks to the researchers exploring where these theories can apply in materials that ...

Abstract: Numeric simulation and experimental observation of phenomena of changing Fraunhofer diffraction pattern of Josepson junction by an array of ferromagnetic dots is presented. We observed a ...

Implicit periodic structure in phase-only holograms will result in many diffraction orders in the diffraction field. We analyzed the diffraction pattern from a phase gratings point of view and proved ...