Dear sir/madam,
Can u tell me a harmless transparent chemical which can only be seen under a uv light (BLB) and not visible normally.

Regards

From Materials That Glow Under Black Light (http://chemistry.about.com/cs/howthingswork/f/blblacklight.htm)


There are a lot of everyday materials that fluoresce, or glow, when placed under a black light. A black light gives off highly energetic ultraviolet light. You can't see this part of the spectrum, which is how 'black lights' got their name. Fluorescent substances absorb the ultraviolet light and then re-emit it almost instantaneously. Some energy gets lost in the process, so the emitted light has a longer wavelength than the absorbed radiation, which makes this light visible and causes the material to appear to 'glow'.

Fluorescent molecules tend to have rigid structures and delocalised electrons.

I'm sure that you can do the research for the fluorescent molecules. With their common names, you can identify the 'transparent' ones (which are invisible under normal light). :)

Thank u. Ill focus my research on fluorescent molecules now, hope ill find something.