What is one common application of ultraviolet light beyond crime scene investigation?

• A. Heating food in microwave ovens.
• B. Detecting counterfeit money.
• C. Viewing infrared heat patterns.
• D. Penetrating materials for X-ray imaging.

Answer: (B)

Ultraviolet (UV) light is often utilized in various applications beyond its role in crime scene investigation, one of which is detecting counterfeit money. This is because many banknotes are designed with special features that fluoresce under UV light, making it easier to verify their authenticity. For instance, certain inks and fibers used in legitimate currency will emit distinct patterns or colors when exposed to UV light, which would not be observed in counterfeit bills.

This application underscores the utility of UV light in enhancing security measures in currency production and fraud prevention, showcasing its importance in the domain of financial transactions.