The purpose of this paper is to study the dependency of light backscattering on particle physical properties: size, refractive index, and shape; and to demonstrate the extreme sensitivity of backscattering on these properties. We demonstrate how the nondescript backscattering pattern evolves seemingly chaotic, in contrast to the orderly forward scattering, with the particle's physical properties. The demonstration was carried out by light scattering from water droplets and with spherical particle Mie theory. Our results show systematic, descriptive evolution of the forward scattering pattern, which is clearly shown in logarithmic Q–space, whereas non-descriptive, chaotic evolution within the backscattering regime is displayed in linear θ–space. Additionally, our study shows that within the last 1°, the backscattering intensity remains constant and featureless for the ∼ 2.5 μm diameter water droplets investigated here.

中文翻译：

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反向散射对球形粒子物理特性的敏感性：大小、折射率和形状偏差


本文的目的是研究光反向散射对粒子物理性质的依赖性：大小、折射率和形状;并证明反向散射对这些特性的极度敏感。我们演示了不起眼的反向散射模式如何根据粒子的物理特性演变成看似混乱的，这与有序的前向散射形成鲜明对比。该演示是通过水滴的光散射和球形粒子 Mie 理论进行的。我们的结果显示了前向散射模式的系统性、描述性演变，这在对数 Q 空间中清楚地显示出来，而反向散射机制中的非描述性、混沌演变则显示在线性 θ 空间中。此外，我们的研究表明，在最后 1° 内，这里研究的直径为 ∼ 2.5 μm 的水滴的反向散射强度保持恒定且无特征。