The frequency range of ultraviolet waves is between 7.5 x 10^14 and 3 x 10^16 Hertz. For this range, the corresponding ultraviolet light wavelengths are 400 to 10 nanometers. Ultraviolet light waves are below the visible light spectrum.
Ultraviolet wavelengths are lower than those in the visible light spectrum, which range from 750 to 400 nanometers. The sun emits ultraviolet radiation in the form of UVA, UVB, and UVC. Ultraviolet B rays may be detrimental and can cause sunburns. However, the ozone layer absorbs most of these rays.
In 1801, Johann Ritter discovered this portion of the electromagnetic spectrum that is invisible through an experiment using photographic paper. Although these rays may be harmful, they also can be beneficial in different industries and the medical field. For example, UV lamps are useful in medical settings such as surgery rooms, where they destroy germs or microbes on surgical instruments. .