Germs, Germs, Germs
Inspectors often use black light to see how clean public bathrooms and restaurant kitchens really are. Black lights are also used to see if kids have thoroughly washed their hands. Under black light, invisible stains in areas missed by a cleaning crew glow becoming visible to the naked eye.
Is Your Money Real?
The government uses black light to detect counterfeit money. Counterfeit money is money not printed by the United States government. Each denomination of new money printed by the government contains a special florescent strip that glows under ultraviolet light.