Why Does Tonic Water Glow? UV Light Experiment

Why is this tonic water glowing blue? In this video, we dive into the world of ultraviolet light. When UV light is shining, we can see a faint blue light, but most of the light is outside of the visible spectrum. This high energy can cause sunburns, and it also energizes quinine, a flavoring ingredient in tonic water, causing it to fluoresce. You can see how regular tap water does not react in the same way!