Vol. 34, issue 08, article # 3

Tkachev I. V., Timofeev D. N., Kustova N. V., Konoshonkin A. V., Shmirko K. A. The Umov effect for irregular shaped particles larger than the wavelength. // Optika Atmosfery i Okeana. 2021. V. 34. No. 08. P. . DOI: 10.15372/AOO20210803 [in Russian].
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Abstract:

The paper presents the results of the study of the Umov effect for large compare to the wavelength of the incident radiation nonspherical particles. The calculation was carried out for particles with maximal sizes of 100, 140, 170 and 200 microns. The results were obtained for 210 different refractive indices, the real part of which varied from 1.3 to 1.6 with a step of 0.5, the imaginary part varied from 0 to 0.1344. It has been shown that the Umov effect is fulfilled for all the particles when the imaginary part of the refractive index is less than 0.001.

Keywords:

light scattering, absorption, Umov effect, physical optics, geometric optics, non-spherical particles

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