I have a educational background in quality control and business administration - both associates degrees. I am interested in electronics and have a General amateur radio operator's license. I've often wondered if a rainbow in a bottle could be constructed using a something like a LED projecting a light source in the 340nm range into a desktop container that is filled with atomized water or salt water (more dense cloud generated). I can only speak in generalities, not knowing the physics of light that may be in play here. I have worked around xenon arc accelerated weathering equipment, and know a little about the light wavelengths used to provide the most intense part of the light spectrum exhibited by the sun. Has anyone ever experimented with anything similar in your studies or experience?? thanks.