Elliptical Halos

Details Elliptical Halos Elliptical Halos

Jul 1908

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1908natur..78..272g&link_type=abstract

Nature, Volume 78, Issue 2021, pp. 272 (1908).

Physics

Optics

Scientific paper

IN Pernter's ``Meteorological Optics'' the explanation of haloes, based on a consideration of refraction and reflection in ice-crystals, is given at some length. In particular the elliptical halo described by Mr. Cave in NATURE of July 16 (p. 247) is shown to be a form depending on the sun's altitude. If the sun is less than 25° above the horizon, the phenomenon appears as two arcs touching the 22° halo at its highest and lowest points. For altitudes greater than 70°, it is indistinguishable from the 22° circular halo.

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