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Aerodynamics

  Aerodynamics : Introduction: Aerodynamics, which derives from the Ancient Greek words aero (air) and v (dynamics), is the study of air motion, particularly as it is influenced by solid objects like aeroplane wings. It touches on subjects related to gas dynamics, a branch of fluid dynamics. Aerodynamics and gas dynamics are frequently used interchangeably, however "gas dynamics" refers to the study of the motion of all gases rather than only air. Although fundamental ideas like aerodynamic drag were seen and recorded much earlier, the scientific science of aerodynamics did not start until the eighteenth century.Early aerodynamics research focused primarily on obtaining heavier-than-air flight, which Otto Lilienthal first accomplished in 1891. Since that time, the application of aerodynamics through mathematical analysis, empirical approximations, wind tunnel experiments, and computer simulations has provided a rational foundation for the advancement of heavier-than-air fligh...
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Electron microscope

  Electron microscope : Introduction: An electron microscope is a microscope that illuminates with a beam of accelerated electrons. Electron microscopes offer a higher resolving power than light microscopes and may expose the structure of smaller objects since the wavelength of an electron can be up to 100,000 times shorter than that of visible light photons. While conventional light microscopes are constrained by diffraction to around 200 nm resolution and usable magnifications below 2000, a scanning transmission electron microscope has achieved more than 50 pm resolution in annular dark-field imaging mode and magnifications of up to roughly 10,000,000.   Electron microscope Similar to how optical light microscopes employ glass lenses, electron microscopes create electron optical lens systems using structured magnetic fields.   Microorganisms, cells, big molecules, biopsy samples, metals, and crystals are just a few of the biological and inorganic specimens that can have...
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Computational Physics

  Computational P hysics : Introduction: The study and application of numerical analysis to physics problems for which a quantitative theory already exists is known as computational physics. Computational physics, a branch of computational science, was historically the first field of research to use modern computers. It is sometimes viewed as a branch (or subdiscipline) of theoretical physics, although some people think of it as a research field that complements both theory and experiment.   Computational Physics The difficulties of computational physics: Problems in computational physics are notoriously challenging to address precisely. This is owing to a number of (mathematical) factors, including complexity, chaos, and a lack of algebraic and/or analytic solvability. For instance, it may take a lot of work to develop a workable algorithm (if one can be found), and other cruder or brute-force techniques, like graphical methods or root finding, may be necessary to solve even ...
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