Retrieving "Currency Verification" from the archives

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1. Ultraviolet Light

   Linked via "currency verification"

   Sterilization: UVC germicidal irradiation (UVGI) targets microbial DNA, exploiting the high efficiency of $254 \text{ nm}$ photons to disrupt replication mechanisms.
   Forensics and Material Science: Certain compounds exhibit fluorescence when excited by specific UV wavelengths, a phenomenon exploited in material analysis and currency verification. For instance, specific alloys used in [historical…