Polarised Light
نویسندگان
چکیده
منابع مشابه
Polarisation Vision: Beetles See Circularly Polarised Light
It has long been known that the iridescent cuticle of many scarab beetles reflects circularly polarised light. It now turns out that scarabs can also see this light, potentially using it as a covert visual signal.
متن کاملPolarised light microscopy: principles and practice for the rheumatologist.
Polarised light microscopy is used to detect and measure matter (in fluids, tissues, or cells) that has crystalline or crystalline-like properties. Because light has electromagnetic properties, it can be influenced by the electromagnetic properties of material through .which it passes. In many materials this influence is equal in whatever direction the light is vibrating. But crystalline materi...
متن کاملThomas Rotation and Polarised Light: A non-Abelian Geometric Phase in Optics
We describe a non-Abelian Berry phase in polarisation optics, suggested by an analogy due to Nityananda between boosts in special relativity and the effect of elliptic dichroism on polarised light. The analogy permits a simple optical realization of the non-Abelian gauge field describing Thomas rotation. We also show how Thomas rotation can be understood geometrically on the Poincaré sphere in ...
متن کاملA conservative approach for deep dermal burn wounds using polarised-light therapy.
This article reports a clinical study investigating the role of polarised-light therapy in the conservative treatment of deep dermal burn wounds. In 22 out of 67 patients with deep dermal burn wounds, clinical evaluation revealed only a very limited potential for spontaneous healing, and, despite the fact that the majority of the surgeons (four out of six) would have recommended surgery, these ...
متن کاملTwilight orientation to polarised light in the crepuscular dung beetle Scarabaeus zambesianus.
The polarisation pattern of skylight offers many arthropods a reference for visual compass orientation. The dung beetle Scarabaeus zambesianus starts foraging at around sunset. After locating a source of fresh droppings, it forms a ball of dung and rolls it off at high speed to escape competition at and around the dung pile. Using behavioural experiments in the field and in the laboratory, we s...
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ژورنال
عنوان ژورنال: Nature
سال: 1872
ISSN: 0028-0836,1476-4687
DOI: 10.1038/006026c0