By Alan Isaacs, Market House Books
Complete and recent, this fourth variation is the correct reference software for college students of physics, both in school or at collage. Containing many new entries, and now with biographies of key scientists, it covers all of the generally encountered phrases and ideas of physics.
-- Over 4,000 transparent and concise entries
-- New entries contain team concept, radioisotope imaging, fractional quantum corridor impression, and Lorentz strength
-- function articles on vital themes -- Chronologies chart discoveries in major fields of the topic
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Extra resources for Oxford Dictionary of Physics
See atomic mass unit. Back - New Search analyser A device, used in the polarization of light, that is placed in the eyepiece of a polarimeter to observe plane-polarized light. The analyser, which may be a Nicol prism or Polaroid, can be oriented in different directions to investigate in which plane an incoming wave is polarized or if the light is plane polarized. If there is one direction from which light does not emerge from the analyser when it is rotated, the incoming wave is plane polarized.
The probe is raised and lowered so as to keep this force constant, and a profile of the surface is produced. Scanning the probe over the sample gives a computer-generated contour map of the surface. The instrument is similar to the scanning tunnelling microscope, but uses mechanical forces rather than electrical signals. It can resolve individual molecules and, unlike the scanning tunnelling microscope, can be used with nonconducting samples, such as biological specimens. ) A unit of mass used to express relative atomic masses.
The element was discovered by G. T. Seaborg and associates in 1945, who obtained it by bombarding uranium–238 with alpha particles. Back - New Search ammeter An instrument that measures electric current. The main types are the moving-coil ammeter, the moving-iron ammeter, and the thermoammeter . The moving-coil instrument is a moving-coil galvanometer fitted with a shunt to reduce its sensitivity. c. by using a rectifier. In moving-iron instruments, a piece of soft iron moves in the magnetic field created when the current to be measured flows through a fixed coil.