These polarization detectors are sensitive in the ultraviolet region of the light spectrum.

Astro-2 was the second dedicated Spacelab mission to conduct astronomical observations in the ultraviolet spectral regions.

For example, some have patterns in the ultraviolet region of the electromagnetic spectrum, much like the spider webs described above.

E may be so large that the emitted radiation is in the ultraviolet region.

The ultraviolet region is the part of the electromagnetic spectrum between 10 nm and 400 nm in wavelength.

Other differences that may only be visible in the ultraviolet region have been suggested, but studies have failed to find evidence.

Type I diamonds absorb in both the infrared and ultraviolet region, from 320 nm.

Vibronic bands for 9 other electronic transitions of C have been observed in the infrared and ultraviolet regions.

Chip makers have now pushed past the visible part of the electromagnetic spectrum into ultraviolet region, and cannot progress further with conventional methods.

The problem is that the right kind of X-rays, "soft" ones close to the ultraviolet region, are difficult to produce.