How can you see germs with ultra violet light?

Ultraviolet (UV) light can help visualize germs because many microorganisms, including bacteria and viruses, fluoresce when exposed to UV light. Certain dyes or stains can be applied to the surface or medium containing the germs, making them emit visible light under UV illumination. This property allows for the identification and observation of germs that are otherwise invisible to the naked eye. However, it's important to note that while UV light can highlight the presence of germs, it does not provide information about their viability or specific types.