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Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Extinction and the optical theorem. Part II. Multiple particles.

Matthew J Berg¹, Christopher M Sorensen, Amitabha Chakrabarti

¹Department of Physics, Kansas State University, Manhattan, Kansas 66506-2601, USA.

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|July 3, 2008

Summary

This summary is machine-generated.

Multiple identical particles narrow the forward extinction angle compared to single particles. Interparticle interactions do not alter the fundamental interference mechanism governing extinction cross sections.

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Area of Science:

Electromagnetism
Optical Physics
Computational Physics

Background:

Understanding particle extinction is crucial for light scattering phenomena.
Previous models often simplify particle interactions or geometry.
Investigating collective effects in particle ensembles is an active research area.

Purpose of the Study:

To analytically describe extinction by identical particles in fixed orientation.
To investigate the impact of multiple particles on extinction cross sections.
To explore the role of interparticle interactions in extinction mechanisms.

Main Methods:

Utilized Maxwell's volume integral equation for analytical description.
Employed the discrete dipole approximation for interacting nonspherical particles.
Analyzed interference energy flow and extinction cross sections.

Main Results:

Identical particles narrow the angular region of dominant extinction contribution.
The effect is more pronounced in the forward scattering direction.
Interparticle interactions preserve the core interference-based extinction mechanism.

Conclusions:

Collective effects significantly influence the angular distribution of extinction.
The interference energy flow model accurately captures extinction phenomena.
The discrete dipole approximation provides insights into interacting particle systems.