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1 модель узкого пучка
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2 приближение узкого пучка
Русско-английский физический словарь > приближение узкого пучка
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Radiative transfer equation and diffusion theory for photon transport in biological tissue — Photon transport in biological tissue can be equivalently modeled numerically with Monte Carlo simulations or analytically by the radiative transfer equation (RTE). However, the RTE is difficult to solve without introducing approximations. A… … Wikipedia
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Numerical aperture — The numerical aperture with respect to a point P depends on the half angle θ of the maximum cone of light that can enter or exit the lens. In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes… … Wikipedia
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Witness accounts of the Roswell UFO incident — Follows are excerpts of witness accounts of the Roswell UFO incident.In 1978, author Stanton T. Friedman interviewed Jesse Marcel, who voiced his suspicion that debris he recovered on a ranch near Roswell in 1947 was not of this world. Over the… … Wikipedia
motion-picture technology — Introduction the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… … Universalium
History of structural engineering — The history of structural engineering dates back to at least 2700 BC when the step pyramid for Pharaoh Djoser was built by Imhotep, the first engineer in history known by name. Pyramids were the most common major structures built by ancient… … Wikipedia