The phrase
"ultraviolet wavelengths" refers to a type of light that is not visible to the human eye. It is a high-frequency, short wavelength of light that falls just beyond the violet end of the color spectrum.
Full definition
Watching the sun
in ultraviolet wavelengths of light from space — above our UV light - blocking atmosphere — reveals constant activity, including bursts of light, particles, and magnetic fields.
The treated fibers could be used to transmit a wide range of infrared, visible and
ultraviolet wavelengths of light, according to the research team.
Right: After a couple hundred million years, the red giant star has burned out and collapsed to the white dwarf that shines intensely
in ultraviolet wavelengths.
New research led by astrophysicists at York University has revealed the fastest winds ever seen
at ultraviolet wavelengths near a supermassive black hole.
The team also used specially - calibrated digital cameras and computer models of animal vision to view the nests as the predators might see them, from the sophisticated colour vision of birds - that can
see ultraviolet wavelengths - to the relatively poor colour vision of mongooses that only see blues and yellows.
It involves using a reflectance spectroscopy setup to obtain optical reflectance spectra of paper samples in the near - infrared, visible, and near -
ultraviolet wavelength ranges.
In the past, researchers have focused on studying the corona at
ultraviolet wavelengths from space, and at visible wavelengths from the ground.
At the same time, an extreme ultraviolet imager on SDO can follow small features at eight
different ultraviolet wavelengths that gauge temperatures from 20,000 ˚C to 1 million˚C.
Previous observations with the Hubble Space Telescope (HST) at
ultraviolet wavelengths showed that the star's atmosphere contains very hot gas at about twice the surface temperature.
The distance to the quasar is so great (about 10 billion light - years) that the emitted light is «stretched» by the expansion of the universe from an
invisible ultraviolet wavelength to a visible shade of violet by the time it reaches the 10 - meter Keck I telescope and the LRIS (Low Resolution Imaging Spectrometer) used for this discovery.
Radiation at
ultraviolet wavelengths dissociates atmospheric molecules, initiating chains of chemical reactions — specifically those producing stratospheric ozone — and providing the major source of heating for the middle atmosphere, while radiation at visible and near - infrared wavelengths mainly reaches and warms the lower atmosphere and the Earth's surface1.
From smartphone apps to smart wearables, there are a variety of high - tech ways we can make sure we're not being exposed to too many
harmful ultraviolet wavelengths by being out in the sun.
Recently, NASA's Solar Dynamics Observatory (SDO), the most advanced spacecraft yet designed to study the sun, has returned never - before - seen details of material streaming outward and away from sunspots, as well as extreme close - ups of activity on the sun's surface and the first high - resolution measurements of solar flares in a broad range of
extreme ultraviolet wavelengths.
Like Sirius, however, Vega radiates much more
in ultraviolet wavelengths than Sol, and, not surprisingly, the European Space Agency has used ultraviolet spectral flux distribution data to determine stellar effective temperatures and surface gravities, including those of Vega.
The Spitzer telescope, an infrared telescope, and the Hubble telescope which observes in near - infrared, visible, and
ultraviolet wavelengths of light, combined to gather a wide range of wavelengths of light, and allowed a far more detailed and comprehensive observation of HAT - P - 26b.
It significantly enhances the spectroscopic capabilities of HST
at ultraviolet wavelengths, and provides observers with unparalleled opportunities for observing faint sources of ultraviolet light.
While NASA's Hubble Space Telescope, orbiting around Earth, was able to observe the northern auroras in
ultraviolet wavelengths, NASA's Cassini spacecraft, orbiting around Saturn, got complementary close - up views in infrared, visible - light and ultraviolet wavelengths.
At
ultraviolet wavelengths, there is less reflected sunlight to swamp the dayside aurora, and the uvi filters out most of what there is.
Eventually that star, which now shines fiercely in
ultraviolet wavelengths, will evolve to become a white dwarf, a dense star about as massive as our sun yet only slightly larger than Earth.
Some observations of how cosmic molecules emit and absorb light at
ultraviolet wavelengths have hinted that the fine structure constant, responsible for the strength of electromagnetism, is not the same throughout the universe.
Astronomers today laid out their case for building a new super-Hubble, a giant space telescope covering optical and
ultraviolet wavelengths.
The SDO can see extreme
ultraviolet wavelengths that are blocked by Earth's atmosphere, allowing it to look at the part of the corona where the temperature suddenly rises.
Once Hubble goes, scientists will lose the ability to take jaw - dropping, Hubble - quality astronomical images in visible light, or to probe with a powerful space - based instrument
the ultraviolet wavelengths that are washed out by Earth's atmosphere.
Even now, looking for water vapor in
the ultraviolet wavelengths of light tests the limits of Hubble's abilities, scientists said.
The JWST will build on Hubble's discoveries by bringing something new to the table, an infrared telescope (Hubble mostly, but not always, studies the universe in optical and
ultraviolet wavelengths).
Like Sirius, however, Altair radiates much more in
ultraviolet wavelengths than Sol, and, not surprisingly, the European Space Agency has used ultraviolet spectral flux distribution data to determine stellar effective temperatures and surface gravities, including those of Altair.
The Mars Color Imager (MARCI) is designed to acquire daily global images of Mars for at least 1 martian year at 5 visible wavelengths and 2
ultraviolet wavelengths.
One of the biggest changes is that unlike the Hubble — which looked at visible or
ultraviolet wavelengths, in general — the JWST will be observing the universe primarily in the infrared spectrum.
The other operated at extreme
ultraviolet wavelengths.
The Mars Reconnaissance Orbiter (MRO) Mars Color Imager (MARCI), shown here with a gloved hand for scale, is currently orbiting Mars and taking pictures used to monitor the weather by observing the entire planet every day at 5 visible and 2
ultraviolet wavelengths.
The Mars Color Imager (MARCI) is designed to acquire daily global images of Mars for at least 1 martian year (687 Earth days) at 5 visible wavelengths and 2
ultraviolet wavelengths.
The James Webb houses enormously sensitive instruments capable of detecting minute levels of infrared, while Hubble largely relies upon optical and
ultraviolet wavelengths.
Since there is unlikely to be free oxygen in the atmosphere of such a planet, it probably would not have an ozone layer (O3) as Denebola puts out a lot more hard radiation in
ultraviolet wavelengths than Sol.
Hubble's images and data are found mainly in the visible and
ultraviolet wavelengths.
Radiation, such as the electromagnetic energy spewing from the sun (seen here at two
ultraviolet wavelengths) is the only type of energy transfer that works across empty space.
At
ultraviolet wavelengths, Hubble's Cosmic Origins Spectrograph (COS) is sensitive to absorption from hot gas, which shows up as reduced brightnesses at specific colors in a spectrum.