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Fig. 4. Patterns of the degree (d) and angle (
; measured from the
local mirror meridian) of linear polarization of reflected skylight, and the
area detected polarotactically as water versus the solar elevation
(
s) for a perfectly black glass (with an index of refraction
of 1.5) reflector - which absorbs all penetrating light - calculated for
incident single-scattered Rayleigh skylight with the use of the Fresnel
formulae. The Brewster angle (56° from the nadir for glass with an index
of refraction of 1.5) is represented by a circle within the circular
patterns.
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