Excite fluorescent substances to produce fluorescent reactions

When ultraviolet rays hit certain substances, these substances emit visible light of various colors and different intensities, and when the light source stops irradiating, this light disappears. These substances that emit fluorescence are fluorescent substances. Fluorescent substances are widely present around our lives, such as fluorescent agents (whitening agents), fluorescent minerals, petroleum, biological oils and other fatty compounds, as well as some organic macromolecular compounds (vitamins, amino acids), etc., so we can use the fluorescent reaction in some applications.