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You can use a black light to detect body fluids.It's actually a good way to look for pet urine or make surea bathroom or hotel room is really clean. Cat urine,in particular, glows very brightly under ultraviolet light.Urine glows under a black light primarily because itcontains the element phosphorus.
Similarly, you may ask, what color does urine show up under a blacklight?
yellow
- Purchase or borrow a UV light between 365-385 nm.
- Wait until evening and get the room as dark as possible.
- Go to the area where you suspect the urine is located and turnon the UV light.
- Look for a glowing yellow or neon green spot.
- Sweep the light back and forth, checking various surfaces.
Similarly, what stains does a black light show?
Black lights detect items that containfluorescers within them when the UV rays from the lightshine on them. Some of the spills a person might find with ablack light include: Biological stains: saliva,semen, urine and blood. Laundry stains: dried liquiddetergents.
Black lights or UV lights are used bycrime scene investigators to identify body fluids -including semen, sweat, saliva and urine. This is because bodilyfluids fluoresce - that means they absorb ultravioletlight and re-emit it as visible light.