The luminous principle of noctilucent stone is that the phosphorescent stone absorbs external energy after being irradiated in the sun, and then releases these energy in the dark, forming a silvery white luster; This is closely related to trace impurities in mineral crystals.
Similarly, the fake night pearl will emit fluorescence after being irradiated by strong radioactive sources, and some of them can last for three to five months or even a year. Many luminescent minerals contain radioactivity. If they have not passed the radioactive safety test, it is best not to approach or contact them for a long time.
Extended data:
Artificial noctilucent stone is harmless to the body, because:
Artificial noctilucent stone is a kind of artificial noctilucent stone, also known as artificial noctilucent gravel, which is a high-tech self-luminous product activated by rare earth elements, such as alkaline earth aluminate and silicate. After absorbing various visible light 10 ~ 20 minutes in the daytime, it can continuously emit light 12 hours in the dark at night, and its luminous brightness and duration are 30 ~ 50 times that of traditional ZnS luminescent materials, and it can be recycled indefinitely.
It is non-radioactive and harmless to human body. The luminous crushed stone produced by using the characteristics of new self-luminous materials and the latest artificial jade production technology has the hardness and appearance characteristics of natural stone.
At the same time, there is no radioactive hazard of natural stone, and the products are widely used in indoor and outdoor decoration, garden design and other fields. Its novel luminous effect not only beautifies the environment, embellishes and sets off the landscape, but also has the practical function of indicating and marking at night.