The diffraction spikes so familiar to us in space images are an intrinsic property of the telescope. Reflecting telescopes have two mirrors: a large primary and a smaller secondary. Light hits the ...

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 242, No. 856 (Sep. 12, 1950), pp. 579-607 (29 pages) An analysis is made of the ...

A theoretical astrophysicist may have solved a nearly two-decade-old mystery over the origins of an unusual 'zebra' pattern seen in high-frequency radio pulses from the Crab Nebula. A theoretical ...

[The Thought Emporium] has been fascinated by holograms for a long time, and in all sorts of different ways. His ultimate goal right now is to work up to creating holograms using chocolate, but along ...

What is Electron Backscatter Diffraction (EBSD)? Electron backscatter diffraction (EBSD), also known as backscatter Kikuchi diffraction (BKD), is a powerful characterization technique used to analyze ...

Poly(vinylpyrrolidone)-capped silver nano-hexapods (AgNHs) have been prepared by chemical reduction method using ethylene glycol as a reducing agent, for the study of their structural and elastic ...