Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Size parameter for thermally emitting particles.

D K Lynch1, S Mazuk

  • 1Aerospace Corporation, PO Box 92957, Los Angeles, California 90009, USA. david.k.lynch@aero.org

Applied Optics
|March 8, 2008
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Subsuns, Bottlinger's rings, and elliptical halos.

Applied optics·2010
Same author

Rainbows and fogbows.

Applied optics·2010
Same author

Step brightness changes of distant mountain ridges and their perception.

Applied optics·2010
Same author

Ulloa's observations of the glory, fogbow, and an unidentified phenomenon.

Applied optics·2010
Same author

Mountain shadow phenomena. 2: The spike seen by an off-summit observer.

Applied optics·2010
Same author

On the colors of distant objects.

Applied optics·2005
Same journal

Multifunctional reconfigurable terahertz metasurface based on vanadium dioxide phase transition: achieving broadband absorption and efficient polarization conversion.

Applied optics·2026
Same journal

High-Q-factor electromagnetically induced transparency utilizing quasi-bound states in the continuum in an all-dielectric terahertz metasurface.

Applied optics·2026
Same journal

Automated stitching interferometry for high-precision metrology of X-ray mirrors.

Applied optics·2026
Same journal

Experimental demonstration of an approach to designing a metal-dielectric DBR resonant cavity structure.

Applied optics·2026
Same journal

High-precision wavefront reconstruction from a single-shot interferogram using a physics-driven hybrid feature calibration network.

Applied optics·2026
Same journal

Ultra-high-Q Fano resonance based on coupled topological corner states in Kagome photonic crystals.

Applied optics·2026
See all related articles

The opacity parameter (Omega) better distinguishes thermal emission regimes for particles than the conventional size parameter (X). Omega relates to optical depth and is derivable from scattering theory and geometrical optics.

Area of Science:

  • Physics
  • Astrophysics
  • Materials Science

Background:

  • The conventional size parameter (X) is insufficient for differentiating particle emission regimes.
  • Distinguishing between small and large particles is crucial for understanding thermal emission.

Purpose of the Study:

  • To introduce and validate the opacity parameter (Omega) as a superior metric for classifying particle emission behavior.
  • To establish a more accurate method for analyzing thermal emission from particles of varying sizes.

Main Methods:

  • Derivation of the opacity parameter (Omega = 4 pi ka/lambda) from scattering theory.
  • Demonstration of Omega's relationship to geometrical optics.
  • Comparison of Omega with the conventional size parameter (X = 2 pi a/lambda).

Related Experiment Videos

Main Results:

  • The opacity parameter (Omega) effectively distinguishes between small and large particle emission regimes.
  • Omega is approximately equal to the particle's mean optical depth.
  • The opacity parameter offers a more accurate demarcation than the conventional size parameter.

Conclusions:

  • The opacity parameter (Omega) provides a more robust framework for studying thermal emission from particles.
  • This parameter facilitates a clearer understanding of radiative transfer in particulate media.
  • Future research can leverage Omega for more precise modeling of thermal emission phenomena.