Ultraviolet (UV) stain finder flashlights come in all shapes and sizes. They are useful in a variety of ways. Black lights can help you spot urine stains, fake currency, or even deadly scorpions.

If you purchase an independently reviewed product or service through a link on our website, SPY.com may receive an affiliate commission. The messes you can’t see are often the most odious. Those times ...

Combining a stimuli-responsive material and the Marangoni effect, a microactuator containing a ultraviolet (UV)-light-responsive photoresist and surfactant is fabricated. The locomotion of a ...

A UV light is needed to start a chemical reaction on the chemical coating of the Starlight UV Sun Paper. This turns the yellow coating blue. Photography is the practice of creating images with light, ...