Final answer:
Blood does not fluoresce under ultraviolet light; this is a false statement.
Step-by-step explanation:
The statement that blood will brightly fluoresce when exposed to ultraviolet light is false. While some substances do indeed glow or fluoresce when exposed to ultraviolet (UV) light, human blood is not one of them. Fluorescence occurs when certain materials absorb UV light and then emit it as visible light. Common examples include certain minerals, fluorescent dyes in clothing, and the use of UV light in forensic science to detect organic materials. However, blood does not emit this kind of visible light when illuminated by ultraviolet light.