- knife-edge obstacle
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клиновидная неоднородность
Англо-русский словарь технических терминов. 2005.
Англо-русский словарь технических терминов. 2005.
Knife-edge effect — In electromagnetic wave propagation, the knife edge effect or edge diffraction is a redirection by diffraction of a portion of the incident radiation that strikes a well defined obstacle such as a mountain range or the edge of a building. The… … Wikipedia
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Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… … Universalium