Fermi sphere

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• Fermi energy — The Fermi energy is a concept in quantum mechanics usually referring to the energy of the highest occupied quantum state in a system of fermions at absolute zero temperature. This article requires a basic knowledge of quantum mechanics.Note that… …   Wikipedia

• Fermi surface — ▪ physics       in solid state physics, abstract interface that defines the allowable energies of electrons (electron) in a solid. Named for Enrico Fermi (Fermi, Enrico), who along with P.A.M. Dirac (Dirac, P.A.M.) developed the statistical… …   Universalium

• Sphère de Dyson — Pour les articles homonymes, voir Sphère (homonymie) et Dyson (homonymie). Schéma d’une coquille de Dyson d’une unité astronomique de rayon. Une sphère …   Wikipédia en Français

• Fermi paradox — The Fermi paradox is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations and the lack of evidence for, or contact with, such civilizations.The extreme age of the universe and its …   Wikipedia

• Fermi, Enrico — born Sept. 29, 1901, Rome, Italy died Nov. 28, 1954, Chicago, Ill., U.S. Italian born U.S. physicist. As a professor at the University of Rome, he began the work, later fully developed by P.A.M. Dirac, that led to Fermi Dirac statistics. He… …   Universalium

• Paradoxe de Fermi — Pour les articles homonymes, voir Fermi. Le radiotélescope Very Large Array dans le Nouveau Mexique (États Unis), haut lieu du …   Wikipédia en Français

• Paradoxe de fermi — Pour les articles homonymes, voir Fermi. Une représentation graphique du message d Arecibo, première tentative humaine pour communiquer avec des civili …   Wikipédia en Français

• Dyson sphere — A Dyson sphere (or shell as it appeared in the original paper) is a hypothetical megastructure originally described by Freeman Dyson. Such a sphere would be a system of orbiting solar power satellites meant to completely encompass a star and… …   Wikipedia

• Manhattan Project — This article is about the atomic bomb project. For other uses, see Manhattan Project (disambiguation). Manhattan District The Manhattan Project created the first nuclear bombs. The Trinity test …   Wikipedia

• nuclear weapon — an explosive device whose destructive potential derives from the release of energy that accompanies the splitting or combining of atomic nuclei. [1945 50] * * * or atomic weapon or thermonuclear weapon Bomb or other warhead that derives its force …   Universalium

• NOYAU ATOMIQUE — La découverte d’un noyau minuscule au centre de l’atome date du début du siècle (Rutherford, 1911), mais c’est celle du neutron (Chadwick, 1932) qui lança la physique nucléaire sur ses bases actuelles. Depuis lors, en effet, on admet qu’un noyau… …   Encyclopédie Universelle