Light scattering by particles is the process by which small particles (e.g. ice crystals, dust, atmospheric particulates, cosmic dust, and blood cells) scatter light causing optical phenomena such as the blue color of the sky, and halos.

Formal light scattering theory may be categorized in terms of two theoretical frameworks. One is the theory of Rayleigh scattering (after Lord Rayleigh) that is, strictly speaking as originally formulated, applicable to small, dielectric (non-absorbing), spherical particles.

When light passes from one medium to another, say air, a glass of water, then a part of the light is absorbed by particles of the medium, preceded by its subsequent radiation in a particular direction. This phenomenon is termed a scattering of light.

The scattering pattern of a scatterer for increasing frequency is shown in Figure 34.6. For Rayleigh scattering where the wavelength is long, the scattered power is distributed isotrop-ically save for the doughnut shape of the radiation pattern, namely, the sin2( ) dependence.

In physics, scattering is a wide range of physical processes where moving particles or radiation of some form, such as light or sound, are forced to deviate from a straight trajectory by localized non-uniformities (including particles and radiation) in the medium through which they pass.

Classical light scattering theory was derived by Lord Rayleigh and is now called Rayleigh theory. Rayleigh theory applies to small particles. By small particles, we mean particles whose size is much less than λ or the wavelength of the light that is being scattered. By “much less” we mean.

2025年1月28日 · Theory of Light Scattering from Point Particles: To derive the scattering equation, let’s first consider a simpler system: a dilute gas in vacuum, filled with small particles. We will call these small particles point scatterers, implying that they have no angular dependence on scattering since they have no effective size.

2015年2月1日 · Review of progresses of light scattering theory and application in particle characterization. Review of particle characterization instrumentation that employs light scattering technologies. Overview of current and future trends in light scattering instrumentation.

This theory of light scattering is phenomenological. It provides the connection between the spectrum of the scattered light and various thermodynamic and transport properties of the fluid. The use of the inherently macro-scopic equations of hydrodynamics to describe events on the scale probed by light scattering may seem to be

What is Light Scattering? › Light scattering is a consequence of the interaction of light with the electric field of a small particle or molecule › An incident photon induces an oscillating dipole in the electron cloud › As the dipole changes, energy is radiated in all directions › This radiated energy is called “scattered light”