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Piskovoi V. N. On the dielectric approximation in the additional light waves theory: an historical rehabilitation (recovery) [Електронний ресурс] / V. N. Piskovoi, E. F. Venger // Semiconductor physics quantum electronics & optoelectronics. - 2015. - Vol. 18, № 3. - С. 255-258. - Режим доступу: http://nbuv.gov.ua/UJRN/MSMW_2015_18_3_5 After the basic Pekar papers on crystal optics with spatial dispersion (CSD) among a lot of others there was the "dielectric approximation" (DA) method. But soon it has been fully rejected because, as it was recognized by the m ain group of authors on the theme, it came in conflict with the law of conservation of energy flux through the ideal vacuum-crystal interface. The objective of this paper is to advance a way for rehabilitation of DA method by using indispensable broadening and essential generalization of the expression just for the energy flux density vector (EFDV) at the vacuum-medium interface (the so-called Poynting-Pekar vector in the additional light waves (ALW) theory).
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