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Manufacturers purposely include fluorescent additives in antifreeze fluid so that black lights can be used to find antifreeze splashes to help investigators reconstruct automobile accident scenes. Are you a science expert. If you have a jellyfish handy, see what it looks like under a black light in a darkened room. It also shows that if you illuminate dry semen with a band of light around nm HPBW 40 nm ie nm , which is invisible to the human eye, then the semen will fluoresce, into the blue visible region ref trace 2. Blood does not glow under a black light, but it reacts with a chemical that does fluoresce, so it can be detected after this reaction using ultraviolet light at a crime scene.

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When you have your light turned off, the light given off is energy that it previously have absorbed. I switch off light and there is no light to bounce off the material, so what is this phosphorescence material absorbing in order to discharge something slowly. It can also cause an electron to jump to a higher energy level. UV transitions are often found in molecules with aromatic structures, in particular multiple rings in a 'row'. Luminol is still not perfect. it can be messy by detecting many other substances such as bleach-based cleaning products, and animal urine and feces. You can't see this part of the spectrum, which is how 'black lights' got their name.

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Corals and some fish may be fluorescent. If the molecule emits a color, watch out. Many plastics glow under black light. This can come about it a few different ways.

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Description: Corals and some fish may be fluorescent. A very representative group of compounds is the conjugated dienes. Want to add to the discussion. Some bottles will grow more brightly than others, so if you're after the glow, take a pen-sized black light with you to the store. Here is a list of other materials that glow. The Hope Diamond, which is blue, phosphoresces red for several seconds after exposure to shortwave ultraviolet light.
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