ultraviolet light


  • WordNet 3.6
    • n ultraviolet light radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
    • ***


In literature:

The mechanism for the production of ozone is the absorption by oxygen molecules (O2) of relatively short-wavelength ultraviolet light.
"Worldwide Effects of Nuclear War: Some Perspectives" by United States Arms Control and Disarmament Agency
The ultraviolet microscope shows us objects hitherto invisible because smaller than the wave length of visible light.
"The Grain Ship" by Morgan Robertson

In news:

The image you see is in ultraviolet channels, not visible light.
In the nebula, hot newborn stars that formed from clouds of hydrogen gas shine brightly with ultraviolet light.
New Research Shows Ultraviolet Light Beneficial to Darker-skinned Patients.
Researchers say that's because their studies show the risk of MS is linked to seasonal trends, which means the amount of ultraviolet light that hits the skin.
Wedeco AG Water Technology, a manufacturer of water disinfection systems based on ultraviolet (UV) light, has won a major contract in Sweden in the drinking water sector.
Traditional light- cure adhesives, by contrast, need ultraviolet (UV) light with wavelengths between 250 and 365 nm.
NASA's image of the day for Nov 20, 2012, shown at right and full-size at the link, was captured in the 304 Angstrom wavelength of extreme ultraviolet light and shows the two eruptions .
Shown in the video in extreme ultraviolet light, the filament collapsed and exploded in spectacular fashion.
NASA Solar Dynamics Observatory captured this gorgeous video of a recent outburst from the sun's surface in ultraviolet light.
Scientists aren't sure why, but scorpions are fluorescent under ultraviolet light.
75% of skin cancer deaths are melanoma related cancers, of which the main contributor is ultraviolet light, a.k.a.
Since 1977, TrojanUV has led the change to water disinfection systems that use environmentally responsible, cost-effective ultraviolet light in place of chemicals.
With wavelengths from 10 to 400 nm, ultraviolet (UV) starts at the end of visible light and ends at the beginning of X-rays.
Bugs & Fixes: No green light for UltraViolet .
A process using ultraviolet (UV) light to kill bacteria and viruses.

In science:

Gonzalez Delgado et al. (1998) presented HST images and ultraviolet spectra of three Seyfert 2 nuclei (IC 3639, NGC 5135 and IC 5135); the data show the existence of nuclear starbursts (with absorption features formed in the photosphere of late O and early B stars) dominating the ultraviolet light.
AGNs with composite spectra II. Additional data
This was later confirmed by Bonatto et al. (1998), who reproduced the ultraviolet continuum of a sample of nearby spiral galaxies by stellar population synthesis and concluded that in the case of NGC 7582 the UV light is dominated by recent star formation with an age t ≤ 500 Myr in a reddened nuclear starburst.
The 10-200 micron spectral energy distribution of the prototype Narrow-Line X-ray galaxy NGC 7582
While counts having a logarithmic slope d log N/dmAB = α ≥ 0.40 continue to add to the EBL at the faintest magnitudes, it appears that the HDF survey has achieved the sensitivity to capture the bulk of the near-ultraviolet, optical, and near-IR extragalactic light from discrete sources.
The Optical Extragalactic Background Light from Resolved Galaxies
The parameters derived from Cherenkov images include Hillas, fractal and wavelet moments, while those obtained from non-image Cherenkov data consist of pulse profile rise-time and base width and the relative ultraviolet to visible light content of the Cherenkov event.
Image and Non-Image Parameters of Atmospheric Cherenkov Events: a comparative study of their gamma-ray/hadron classification potential in UHE regime
Cherenkov event, including its linear polarization state, time-profile and ultraviolet-to-visible light spectral content (U/V ratio).
Image and Non-Image Parameters of Atmospheric Cherenkov Events: a comparative study of their gamma-ray/hadron classification potential in UHE regime
Measurements with a dielectric such as Diamond would provide an excellent test of the theory and allow the possibility to discharge the surface by use of ultraviolet light.
The Low-Frequency Character of the Thermal Correction to the Casimir Force between Metallic Films
These devices work well in the reddest bands (800-900nm) where the ultraviolet and visible light of redshifted high-z SnIa is detected.
Accelerating Universe: Observational Status and Theoretical Implications
Recently, with the launch of the twin spacecrafts STEREO A and B, disk observations of the solar atmosphere in extreme ultraviolet wavelengths (EUVI) and coronal observations in white light using the SECCHI coronagraphs from two vantage points simultaneously became available.
CME observations from STEREO
In the ultraviolet range used for air fluorescence measurements, the absorption of light is much less important than scattering [11, 33], although there are some exceptions discussed in Section 3.2.1.
A Study of the Effect of Molecular and Aerosol Conditions in the Atmosphere on Air Fluorescence Measurements at the Pierre Auger Observatory
Figure 1 shows the mean of the ultraviolet and optical blue light curves from the observations.
GALEX and Optical Observations of GW Librae During the Long Decline from Superoutburst
High harmonic generation (HHG) refers to the interaction of high intensity laser light with matter, which leads to the emission of broadband coherent radiation in the extreme ultraviolet domain.
Inhomogeneous High-order Harmonic Generation in Krypton Clusters
Then, the ultraviolet light declines and the spectrum reddens rapidly as lower-mass stars progressively complete their evolution.
Calculationally, these singularities manifest themselves as ultraviolet divergences for the light-cone operators.
Asymmetric Parton Distributions
Individual young stars are unresolved in all but the closest galaxies, even with the Hubble Space Telescope (HST), so most information on the star formation properties of galaxies comes from integrated light measurements in the ultraviolet (UV), far-infrared (FIR), or nebular recombination lines.
Star Formation in Galaxies Along the Hubble Sequence
The ultraviolet light is produced mainly by short-lived, massive (O and early B) stars and can be used to infer the instantaneous star formation rate, nearly independent of the prior star formation history.
Cosmic Histories of Stars, Gas, Heavy Elements, and Dust