Uv Light Spectrum

Ultraviolet uv is a form of electromagnetic radiation with wavelength from 10 nm with a corresponding frequency of approximately 30 phz to 400 nm 750 thz shorter than that of visible light but longer than x rays uv radiation is present in sunlight and constitutes about 10 of the total electromagnetic radiation output from the sun it is also produced by electric arcs and specialized.

Uv light spectrum. Ultraviolet uv radiation is defined as that portion of the electromagnetic spectrum between x rays and visible light i e between 40 and 400 nm 30 3 ev. A spectrum is a range of wavelengths rather than one specific wavelength the uv spectrum is just one part of the entire electromagnetic em spectrum. Ultraviolet light is a type of electromagnetic radiation that makes black light posters glow and is responsible for summer tans and sunburns. Although we see sunlight or white light as uniform or homogeneous in color it is actually composed of a broad range of radiation wavelengths in the ultraviolet uv visible and infrared ir portions of the spectrum.

Philips low pressure uv c lamps have their main emission at 254 nm where the action on dna is 85 of the peak. This invisible radiation includes the wavelength range of 100 nm to 400 nm. Ultra violet uv light is invisible to the human eye and is divided into uv a uv b and uv c. Uv ultraviolet light refers to the region of the electromagnetic spectrum between visible light and x rays with a wavelength falling between 400 and 10 nanometers.

Ultraviolet uv light is a component of the electromagnetic spectrum that falls in the region between visible light and x rays. The perils and benefits of uv. There are a number of subcategories of uv radiation including. Uv light can be further subdivided and categorized into four separate regions.

The sun is our primary natural source of uv radiation. This is why the invisible electromagnetic rays just beyond the visible light spectrum are called ultraviolet uv radiation. Ultraviolet germicidal irradiation uvgi is a disinfection method that uses short wavelength ultraviolet ultraviolet c or uv c light to kill or inactivate microorganisms by destroying nucleic acids and disrupting their dna leaving them unable to perform vital cellular functions. Uvgi is used in a variety of applications such as food air and water purification.

When people refer to ultraviolet uv light they usually mean the uv spectrum. The uv spectrum is divided into vacuum uv 40 190 nm far uv 190 220 nm uvc 220 290 nm uvb 290 320 and uva 320 400 nm. In the graph can be seen that germicidal action is maximized at 265 nm with reductions on either side. On the other end of the visible light spectrum blue light rays with the shortest wavelengths and highest energy are sometimes called blue violet or violet light.