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Reflective collars, usually made with nylon webbing, incorporate reflective tape that ensures that the dog will be seen at night by approaching vehicles. A lighted collar (or collar light, dog light) is a collar that emits light in order to make a dog more visible in the dark to their owners and more importantly, nearby motorists. It is not ...
The most expensive dog collar in the world is the $3.2 million, diamond-studded Amour Amour, [1] once called “the Bugatti of dog collars”. [2]The chandelier-design, 52-carat collar has over 1,600 hand-set diamonds, with a 7-carat, D-IF (flawless) color-graded, brilliant-shaped centerpiece.
Reflectors made of alternating layers of flat guanine crystals (refractive index, n = 1.83) and cytoplasm (n ≈ 1.33) have evolved independently in fish scales and in the tapeta of the eyes of elasmobranchs (Gur 2017). The tapetum of the bush-baby, Galago crassicaudatus, has a similar structure, but with crystals of riboflavin (n = 1.73).
The dark blue, teal, and gold tapetum lucidum from the eye of a cow Retina of a mongrel dog with strong tapetal reflex. The tapetum lucidum (Latin for 'bright tapestry, coverlet'; / t ə ˈ p iː t əm ˈ l uː s ɪ d əm / tə-PEE-təm LOO-sih-dəm; pl.: tapeta lucida) [1] is a layer of tissue in the eye of many vertebrates and some other animals.
An Australian Kelpie wearing a plastic Elizabethan collar to help an eye infection heal. An Elizabethan collar, E collar, buster collar, pet ruff or pet cone (sometimes humorously called a treat funnel, lamp-shade, radar dish, dog-saver, collar cone, or cone of shame) is a protective medical device worn by an animal, usually a cat or dog.
A photonic crystal is an optical nanostructure in which the refractive index changes periodically. This affects the propagation of light in the same way that the structure of natural crystals gives rise to X-ray diffraction and that the atomic lattices (crystal structure) of semiconductors affect their conductivity of electrons.
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