UV-light

1 год назад

This video compares two UV flashlights, one with a 365nm wavelength and the other with a 395nm wavelength. The video demonstrates how the different wavelengths affect the curing of UV-reactive glue, the detection of stains, and the visibility of UV-reactive inks on currency. The video also tests the UV protection of glasses.

2 года назад

This video explores the uses of a UV flashlight, a tool that emits ultraviolet light. The host demonstrates how the flashlight can reveal hidden details on IDs, detect cleanliness in an Airbnb, and even illuminate certain creatures in the wilderness. The video also highlights the flashlight's ability to charge glow-in-the-dark items.

12 лет назад

This video explores the science behind ultraviolet light, also known as black light. The speaker explains how UV light interacts with phosphorus in everyday objects, causing them to glow. They then demonstrate this phenomenon by shining a UV light on various items in their apartment, revealing surprising results.