Phosphors for Ornament is a powder that can be excitated by 365nm UV.It can be used in scenery,upholstery and artware. It is used for decoration. Biological ornament is a structure of an animal that appears to serve a decorative function rather than an ostensible, utilitarian function. Ornaments are used in displays to attract mates. There are several evolutionary explanations for the presence of ornaments. Darwin was the first to correctly hypothesize that sexual selection by female choice was responsible for the evolution of elaborate plumage and remarkable displays in male birds such as the quetzal and the sage grouse. The modern-day Christmas ornament was originally invented in the small German town of Lauscha in the mid-19th century.
An animal may shake, lengthen, or spread out its ornament in order to get the attention of the opposite sex, which will in turn choose the most attractive one. Ornaments are most often observed in males and picking an extravagantly ornamented male benefits females because those “good genes” will be passed on to her offspring, increasing their survival or reproductive fitness. Ornaments are almost always reused year after year, rather than purchased annually, and family collections often contain a combination of commercially produced ornaments and decorations created by family members. Such collections are often passed on and augmented from generation to generation. Other glassblowers in Lauscha recognised the growing popularity of Christmas baubles and began producing them in a wide range of designs.
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