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Reflection of narrow light beams by a dissipating medium

I. Spatial distribution of the background brightness under multiple scattering

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The brightness distribution of multiple back-scattering of radiation is investigated in a plane perpendicular to the beam axis as a function of the density of the artificial mists and smokes. The range of the distances from the beam axis (base) investigated was 0.02–1 m or 10−4−1.8 in optical quantities. The investigations were accompanied by parallel measurements of the scattering index by using a turbidimeter, which permitted making quantitative estimates of the influence of the form of the index on the magnitude of the intensity of the multiply-scattered radiation for diverse values of the optical base. It is shown that the brightness distribution of the multiply scattered radiation takes on a smoother shape as the elongation of the index increases.

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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 61–65, November, 1973.

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Donchenko, V.A., Kabanov, M.V., Matvienko, G.G. et al. Reflection of narrow light beams by a dissipating medium. Soviet Physics Journal 16, 1529–1532 (1973). https://doi.org/10.1007/BF00889956

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  • Radiation
  • Reflection
  • Smoke
  • Light Beam
  • Quantitative Estimate