electron drift
91mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …
92Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
93Scanning tunneling microscope — Image of reconstruction on a clean Gold(100) surface …
94Polymer solar cell — Polymer solar cells are a type of organic solar cell: they produce electricity from sunlight. A relatively novel technology, they are being researched by universities, national laboratories and several companies around the world. Device physics… …
95nature, philosophy of — Introduction the discipline that investigates substantive issues regarding the actual features of nature as a reality. The discussion here is divided into two parts: the philosophy of physics and the philosophy of biology. In this… …
96Ionosphere — The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner …
97Transistor — For other uses, see Transistor (disambiguation). Assorted discrete transistors. Packages in order from top to bottom: TO 3, TO 126, TO 92, SOT 23 A transistor is a semiconductor device used to amplify and switch electronic signals and power. It… …
98Neutrino oscillation — is a quantum mechanical phenomenon predicted by Bruno Pontecorvo[1] whereby a neutrino created with a specific lepton flavor (electron, muon or tau) can later be measured to have a different flavor. The probability of measuring a particular… …
99Expanding Earth theory — The Expanding Earth theory is an attempt to explain the position and movement of continents (continental drift) on the surface of the Earth. The expanded earth theory (and plate tectonics) incorporates the appearance of new crustal material at… …
100radical — radicalness, n. /rad i keuhl/, adj. 1. of or going to the root or origin; fundamental: a radical difference. 2. thoroughgoing or extreme, esp. as regards change from accepted or traditional forms: a radical change in the policy of a company. 3.… …
