anisotropic group
81Modern searches for Lorentz violation — Important motivations for modern searches for Lorentz violation are deviations from Lorentz invariance (and thus special relativity) predicted by some variations of quantum gravity, string theory, and some alternatives to general relativity.… …
82General relativity — For a generally accessible and less technical introduction to the topic, see Introduction to general relativity. General relativity Introduction Mathematical formulation Resources …
83Hematite — For other uses, see Hematite (disambiguation). Hematite Hematite (blood ore) from Michigan (unknown scale) General Category …
84Wafer (electronics) — Polished 12 and 6 silicon wafers. The flat cut into the right wafer indicates its doping and crystallographic orientation (see below) …
85Raman spectroscopy — Energy level diagram showing the states involved in Raman signal. The line thickness is roughly proportional to the signal strength from the different transitions. Raman spectroscopy (   …
86Van der Waals force — In physical chemistry, the van der Waals force (or van der Waals interaction), named after Dutch scientist Johannes Diderik van der Waals, is the sum of the attractive or repulsive forces between molecules (or between parts of the same molecule)… …
87Shape of the Universe — Edge of the Universe redirects here. For the Bee Gees song, see Edge of the Universe (song). The local geometry of the universe is determined by whether Omega is less than, equal to or greater than 1. From top to bottom: a spherical universe, a… …
88Vanadinite — Infobox mineral name = Vanadinite category = Vanadate mineral boxwidth = boxbgcolor = imagesize = 300px caption = Vanadinite from Arizona, USA formula = Pb5(VO4)3Cl molweight = 1,416.27 g/mol color = Bright red, orange red, red brown, brown,… …
89Nepenthes — For the drug of forgetfulness mentioned in Greek mythology, see Nepenthe. Nepenthes Upper pitcher of Nepenthes edwardsiana Scient …
90Ising model — The Ising model, named after the physicist Ernst Ising, is a mathematical model in statistical mechanics. It has since been used to model diverse phenomena in which bits of information, interacting in pairs, produce collectiveeffects.Definition… …
