Skylight Polarization patterns and Animal Orientation
نویسندگان
چکیده
منابع مشابه
An Evaluation of Skylight Polarization Patterns for Navigation
Skylight polarization provides a significant navigation cue for certain polarization-sensitive animals. However, the precision of the angle of polarization (AOP) of skylight for vehicle orientation is not clear. An evaluation of AOP must be performed before it is utilized. This paper reports an evaluation of AOP of skylight by measuring the skylight polarization patterns of clear and cloudy ski...
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Field observations reveal that night-migrating passerines sometimes fly during early morning hours. Functional consideration of daytime flights have overshadowed proximate questions regarding the sensory basis of daytime orientation. I conducted a series of early morning cage-orientation experiments in spring with four species of migrating warblers (Parulinae) on the north coast of the Gulf of ...
متن کاملAn Analytical Model for Skylight Polarization
Under certain circumstances the polarisation state of the illumination can have a significant influence on the appearance of scenes; outdoor scenes with specular surfaces – such as water bodies or windows – under clear, blue skies are good examples of such environments. In cases like that it can be essential to use a polarising renderer if a true prediction of nature is intended, but so far no ...
متن کاملThe polarization of skylight: An example from nature
A simple analytical model is presented for calculating the major features of the polarization of skylight over a hemisphere centered on an earthbound observer. The model brings together material from different topics in optics: polarization of plane waves, natural unpolarized light, and dipole scattering. Results calculated with the simple model are compared with experimental data. A brief desc...
متن کاملDo monarch butterflies use polarized skylight for migratory orientation?
To test if migratory monarch butterflies use polarized light patterns as part of their time-compensated sun compass, we recorded their virtual flight paths in a flight simulator while the butterflies were exposed to patches of naturally polarized blue sky, artificial polarizers or a sunny sky. In addition, we tested butterflies with and without the polarized light detectors of their compound ey...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1982
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.96.1.69