Final answer:
The statement that rat urine fluoresces under UV light is true, due to the presence of phosphorus in the urine that causes this fluorescence. The phenomenon is used in various applications, including tracking rodents and enhancing microscopy visibility.
Step-by-step explanation:
The statement that rat urine will fluoresce under UV light is true. Many biological substances, including the urine of some animals, contain compounds that can fluoresce when exposed to ultraviolet light. This property can be used for tracking and identification purposes.
For example, fluorescein is a commonly used fluorescent dye and, similar to this, rat urine contains molecules that can emit light when illuminated with UV light, a phenomenon known as fluorescence. This is due to the presence of phosphorus, which is a component of urine that can fluoresce. This characteristic allows for the detection of urine trails and other signs of rodent presence.
Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation and is used in various applications, including microscopy, where UV light is used to reveal details not observable with visible light alone.