Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

How are glories formed?

Not Accessible

Your library or personal account may give you access

Abstract

Mie theory can be used to generate full-color simulations of atmospheric glories, but it offers no explanation for the formation of glories. Simulations using the Debye series indicate that glories are caused by rays that have suffered one internal reflection within spherical droplets of water. In 1947, van de Hulst suggested that backscattering (i.e., scattering angle θ = 180°) could be caused by surface waves, which would generate a toroidal wavefront due to spherical symmetry. Furthermore, he postulated that the glory is the interference pattern corresponding to this toroidal wavefront. Although van de Hulst’s explanation for the glory has been widely accepted, the author offers a slightly different explanation. Noting that surface waves shed radiation continuously around the droplet (not just at θ = 180°), scattering in a specific direction θ = 180° − δ can be considered as the vector sum of two surface waves: one deflecting the incident light by 180° + δ and the other by 180° + δ. The author suggests that the glory is the result of two-ray interference between these two surface waves. Simple calculations indicate that this model produces more accurate results than van de Hulst’s model.

© 2005 Optical Society of America

Full Article  |  PDF Article
More Like This
Atmospheric glories: simulations and observations

Philip Laven
Appl. Opt. 44(27) 5667-5674 (2005)

Effects of refractive index on glories

Philip Laven
Appl. Opt. 47(34) H133-H142 (2008)

Noncircular glories and their relationship to cloud droplet size

Philip Laven
Appl. Opt. 47(34) H25-H30 (2008)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (14)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved