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Torchlight / Same material used for the stars and planets stickers
Torchlight / Same material used for the stars and planets stickers
Torch lights are made of a special material these days in order to locate them even in the darkness too. These special torch lights appear with a kind of lighting in the darkness. There is a close chemical and physical relationship between the light and materials. Among them one is the phosphorescence characteristic. There are some materials that exhibit this characteristic. For example, the materials like Zinc Sulphide, Strontium Aluminate and so on are exited due to light. These materials will be in this exited stage for most of the time and comes to their normal state gradually. Even after stopping of getting the light, these materials continue to be in the exited stage. This is called as phosphorescence. Besides torchlight even the small stars kind objects which are sticked to the ceilings in the rooms are also made of this material. One can observe the stars and planet stickers shining bright when lights go off. But after sometime, their brightness will decrease.
