Do you want to make a glowing water. This is how to do it. Get a highlighter, cut it open and you will see the colored rod made of cotton. get a glass of water and stir it using the rod and the color will be transferred to the water. Close all the lights and open a blacklight, also called UV light. You will see the water actually glowing.
You can watch this for further info:) in this videos, tonic water was used but hey, its just he same.
http://www.youtube.com/watch?v=j0aULZKQcd4
http://www.youtube.com/watch?v=yKhBXsbASPg
This is happening because of fluorescence. There are some materials that decreases the frequency of EM waves and they are called fluorescent objects. Because of the highlighter acting as a flourescent, the UV light's frequency is decreased making it visible to the eye.:)
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