Light is also different. Some are self luminous, which is a kind of light emission of non thermal radiation of substances. The main application fields are in light sources, display devices, detector devices and optoelectronic devices. The popular point is that light, neon lights at night and other electric luminescence. Of course, there are solar and fire that do not need electricity. Among marine organisms, there are also Marine luminous organisms, which are due to their own luminous organs, cells or symbiotic bacteria.
Fluorescence is a special kind of light. Its characteristic is that it does not emit light by itself, but a cold luminescence phenomenon of photoluminescence. Students with poor physics may not understand it well. Here, we only need to remember that fluorescence is a phenomenon of being illuminated by light. In daily life, all kinds of weak light are generally called fluorescence without carefully investigating and distinguishing its luminescence principle.
Reflection is often referred to as reflected light. People can see everything in the world. In fact, the light reflected by the object is focused on the retina. The importance of reflection can be seen. The light reflected by different colors and materials is different. White objects reflect almost all the light of the light source, with strong reflection and less exposure; Black objects absorb almost all the light of the light source, have no reflection, and have more exposure. Other objects have strong or weak reflections according to the nature and depth of color and texture. Here we have to mention reflective materials. With the development of science and in-depth research, the reflective effect of reflective materials is getting better and better.
The reflective strip on the reflective vest uses the principle of light return reflection to produce reflective effect. There are energy problems and light pollution problems in the luminescence, while the fluorescence is too weak and difficult to control. Only the reflection can faithfully and effectively reflect the light back with the help of reflective materials, effectively ensuring the safety of traffic police and operators at night. A small reflective strip can be said to play a very important role
