well i just watched something about it but you can watch video its kinda hard explain so here is the link http://video.about.com/chemistry/How-to-Make-Glowing-Water.htm
Chat with our AI personalities
Highlighter water contains fluorescent compounds that absorb ultraviolet light and re-emit visible light, creating a glowing effect under a black light. The fluorescent molecules in the highlighter water get excited by the UV light and emit a different color of light, giving off a glowing appearance.
A highlighter glows more than tonic water because it contains fluorescent compounds that emit visible light under ultraviolet (UV) light. Tonic water, on the other hand, contains quinine which emits a faint blue glow under UV light but is not as bright as the fluorescence from a highlighter.
To make water appear to glow, fluorescent highlighter colors like neon yellow, green, or pink work best. The fluorescent dye in these colors emits a bright glow under UV light, creating the effect of glowing water. Remember to use caution and handle highlighter dyes with care when using them for this purpose.
Highlighter ink does not glow in the dark on its own. To make water glow in the dark, you would need to use a fluorescent or phosphorescent pigment designed for that purpose. These pigments are usually powders that need to be mixed with water in specific quantities and then exposed to light to charge up before they will glow in the dark.
The answer is a Black light and Tonic Water. Tonic water contains a chemical called quinine which makes it glow bright blue when the water is exposed to black light.You take a bowl and put water or Tonic water just in case you want to drink it.Then you put highlighter ink in the water then stir the ink in the water. It looks kinda weird, but then you put the black light over it and it GLOWS.
Certain foods that contain fluorescent compounds, such as tonic water, certain types of fish, and some types of cheese, can glow under a black light.