The primary source of ultraviolet light is the sun, and most of the UV light that reaches earth is in the lower-frequency UVA region (see below). Although ultraviolet (UV) light is widely known as ...

According to their math, as the frequency of emitted radiation tended toward the ultraviolet range, the output energy would have to be infinite, birthing the phrase Ultraviolet Catastrophe.

Higher frequencies, which are those above the visible spectrum, make up ultraviolet (beyond violet) light. Having the most energetic frequencies, UV light can wrinkle your skin, give you sunburn ...

We cannot see ultraviolet (UV) light but it can have hazardous effects on the human body. Ultraviolet light in sunlight can cause the skin to tan or burn. Fluorescent substances are used in energy ...