[MSA] 8cm German light windmill windmill light ocean blue crystal ball glass art wedding gifts Christmas gift

** Please contact press [designer] Note lettering content (in English, Japanese and Korean figures can) ** Brand: MSA GLASS ENGRAVING Material: Glass Size: Glass ball diameter 8cm / height of about 23cm Origin: Germany system Lettering: Base lettering (hand carved can not specify font designer / in English and Japanese figures can) ** Custom range: a text ** ** (Special customized according to the complexity of the additional offer, welcome to provide custom drawing) ** ■ Note: (1) Optical glass spheres windmill vacuum may be produced in the manufacturing process of a little fine metal powder (black metal sheet from a metal powder), are each attached to a possible slight glass is normal non-defective, can be accept this label to describe the state or store personally seen the real product reorder avoid misunderstandings and disputes. (2) light windmill structure is very delicate, avoid violent shaking or impact when storing or viewing. (3) a little color to the real product colors prevail, customized by engraving personal items belong to forgive can not be returned. Germany imported manufactured very special gift exquisite plus exclusive custom lettering base glass carving art can be the name or memorial date or greetings engraved on glass base, with the principle of unique artistic taste, combined with light as decoration or fun Favorite pleasing ~ Light windmill color with the surrounding ambient light have color effect, will also affect the computer screen to set different color, in real product colors prevail ** What is light windmill? ** Light Windmill in Germany formerly Radiometer, is a sufficiently show how rich light energy into kinetic energy of educational physical devices. It consists of a glass sphere and mounted on a needle combined four metal blade assembly is made when the light shines on a metal blade, which four metal sheets will begin to spin up, the stronger the faster rotation of the light, Light weaker rotates more slowly, or even stationary ** Light windmill principle of operation? ** When sunlight or the light bulb (not cold neon light) metal sheet in the light of the windmill, these metal pieces will be to rotate at different speeds when strong light and it will turn too fast, when the light is weak when it will slow down. Glass ball is near vacuum state, in order to maintain the internal balance of air resistance and rotational power, black metal sheet surface than the white surface absorb more light, so the pressure is also a black face than the white surface is large, when the inner sphere When the heat is gradually increased, a black metal sheet surface pressure is also increasing, then rotate up. (Molecular theory of Brown) HOW THE SOLAR RADIOMETER WORKS When warm light, that is sunlight or the light of electric bulbs (but not cold neon light) strikes the wings resting on the needle in the radiometer bowl they start to turn. Depending on the power of the light, the wings turn at varying speeds. Inside the glass bowl there is a partial vacuum produced by the air being thinned in order to keep the balance between air resistance and the turning power of the solar energy. The black surfaces of the wings absorb more light than the white surfaces, therefore the pressure on the black surfaces is much stronger than on the white surfaces. The more the molecules in the bowl heat up, the stronger the pressure on the black surfaces and the wings start to turn steadily. (Molecular theory of Brown.) http://www.youtube.com/watch?v=UmtTQK1Tgt8 http://www.nt150.com.tw/shop/Stores_APP/images/images_103/R080321-Pn1.jpg Chinese carvings ** ** reference example http://www.nt150.com.tw/shop/Stores_APP/images/images_103/R080321-Bn3.jpg