Study of Optical Properties of Ambient Biomass Burning Plumes by Mie Scattering (CAT#: STEM-ST-0080-YJL)

Introduction

Biomass burning produces light-absorbing aerosol containing a mixture of black carbon (BC) and organic carbon (OC). When OC absorbs more strongly at the blue end of solar spectrum than at the red end, it is called brown carbon (BrC) due to its brownish appearance. The exact configuration of BC and OC within the aerosol is highly variable over geography and time. To represent realistically the radiative properties of such composite aerosols in climate models is not an easy task. Furthermore, the amount and the chemical composition of BrC emitted is unknown and it is often inferred from measured optical properties of mixed carbonaceous aerosols.

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Principle Applications Procedure Materials Notes Related Products

Principle

Mie scattering is defined as the type of scattering in which the diameter of the particle is the same or more than the wavelength of the radiation. Mie scattering gives a generalized solution for a system where a scattering of light takes place by a homogenous spherical medium. And this medium should have a refractive index different from that of the medium through which the light is traversing.
Unlike Rayleigh scattering, Mie scattering is not a physically independent phenomenon rather, it is a solution to Maxwell's equations for situations where the phase of the incident angle can change within the dimension of the scattering particles. Mie scattering is more commonly known as Mie solution, and it is named after Gustav Mie, a German physicist.
Mie scattering is also known as aerosol particle scattering, takes place in the atmosphere below 1,500 feet. In Mie scattering, the diameter of the spherical particles through which the light is scattered is approximately equal to the wavelength.

Applications

Mie scattering occurs in a variety of applications, including atmospheric science, cancer detection and treatment, metamaterials, and parasitology. Another application is the characterization of particles by optical scattering measurements.

Procedure

1. Sample preparation
2. Measurement by scattering detection instrument
3. Data analysis

Materials

Mie scattering measurement system

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