Sentences with phrase «emit ultraviolet»

These lights emit no ultraviolet or infrared rays or direct heat onto the surface of the artwork, helping to keep it in good condition.

The Declaration of Independence is lit by a Fiberstars system because the light source does not emit ultraviolet rays or heat.

Many of the young stars that formed in a recent burst of star formation emit the ultraviolet light.

The solar blind camera takes images of objects that emit ultraviolet wavelengths.

As the plane wave travels along, the pattern oscillates rapidly, causing it to emit ultraviolet radiation that the researchers observe.

In particular, astronomers would like to see the Milky Way's star - forming regions emit ultraviolet radiation known as Lyman alpha because it's expected to be both strong and a key diagnostic of conditions in stellar nurseries.

An additional advantage is that LEDs don't emit ultraviolet light, so they don't attract bugs.

These fluctuations correspond neatly to the 11 - year solar cycle, in which the Sun's rotation gradually winds up its magnetic field into contorted coils, giving rise to flares and sunspots that emit ultraviolet and X-ray light.

The HPA tested a sample of compact fluorescent light bulbs (CFLs) and found that some emitted ultraviolet radiation which could, under certain conditions, expose people above international guidelines.

The eruption had also emitted ultraviolet light that reflected off interplanetary hydrogen gas and back into SOHO's cameras.

Collapsing out of dense pockets of hydrogen gas early in the universe's history, the first stars flickered on, emitting ultraviolet light that interacted with the surrounding hydrogen.

When gas falls toward the black hole at the center of the galaxy NGC 4151, the gas heats up and emits ultraviolet radiation, which in turn heats the ring - shaped dust cloud orbiting the black hole at a distance.

A gas which is having it's «other degrees of freedom» excited and emits ultraviolet light which the powdered surface absorbs and re-emits whitish visible light.

This appears to be a deliberate deception which has been so successful that the public now believe the Sun emits ultraviolet and visible light while the warmed Earth emits infrared with 4 microns being the boundary between the two.

Not exact matches

Miller said he doesn't know specifically how the hospital staff used his ultraviolet light - emitting robots to prevent the spread of the virus while Duncan was undergoing treatment.

The sun emits harmful ultraviolet (UV) rays year round.

In addition to emitting visible light, the stars also gave off ultraviolet (UV) radiation, which split the neutral hydrogen it encountered into electrons and protons — ionizing it once again, and thereby launching what researchers call the «epoch of reionization.»

The MIT - led team looked through data collected by two different telescopes and identified a curious pattern in the energy emitted by the flare: As the obliterated star's dust fell into the black hole, the researchers observed small fluctuations in the optical and ultraviolet (UV) bands of the electromagnetic spectrum.

Ideally, the electron gains so much energy in the laser field that upon impact with the atom, a much shorter flash of light with very high energy is emitted — an attosecond laser pulse, with a frequency in the ultraviolet - or x-ray regime.

Ground - based remote sensing through ultraviolet and infrared spectroscopy is used to measure the composition of a volcanic plume, the column of hot volcanic ash, gas, and rock emitted when the volcano erupts.

Its nucleus is predicted to emit and absorb ultraviolet light.

This image shows in ultraviolet light the second - largest flare (bright flash at right), which was emitted on September 10.

The observed amount of ultraviolet radiation emitted by TRAPPIST - 1 indeed suggests that the planets could have lost gigantic amounts of water over the course of their history.

In either case, sulfur atoms in the Mercurial atmosphere would emit detectable ultraviolet light.

Roth and his colleagues instead went looking in Hubble's ultraviolet images, which can capture the light emitted when hydrogen and oxygen molecules collide with stray electrons.

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.

The first stars emitted mainly optical and ultraviolet light, which today is stretched into the infrared by the expansion of space, so they should not contribute significantly to the CXB.

The EUSO telescope, which will be used to find debris, was originally planned to detect ultraviolet light emitted from air showers produced by ultra-high energy cosmic rays entering the atmosphere at night.

It turns out that many molecules found in foods absorb ultraviolet or visible light and subsequently emit light as fluorescence.

The youngest white dwarfs are the hottest and emit strongly in the extreme ultraviolet, which corresponds to temperatures between 100 000 °C and about 1 million °C.

«Returning clumps of debris strike the incoming stream, which results in shock waves that emit visible and ultraviolet light,» said acting Swift principal investigator and study co-author Bradley Cenko, of NASA's Goddard Space Flight Center in Greenbelt, Maryland.

The gas glows because young, extremely hot stars like these are emitting intense ultraviolet light which strips the surrounding gas of its electrons and causes it to emit the faint glow seen in this image.

Researchers looked at seven of these worlds — distant planets whose mass lies between one and 10 times ours — including 55 Cancri e (at right, compared to Earth) and GJ1214b, evaluating how the x-ray and extreme ultraviolet radiation emitted by their parent stars might affect their atmospheres over their remaining lifetimes.

The Leiden scientists replicated the frigid vacuum of interstellar space, then introduced the chemicals found in cometary ice and hit them with ultraviolet light like that emitted by stars.

[2] Neutral hydrogen gas absorbs all the high - energy ultraviolet light emitted by hot young stars very efficiently.

In fluorescence microscopy, certain specimens, such as TB bacteria, can be dyed so that they emit light when exposed to ultraviolet radiation.

«They emit powerful winds and a lot of ultraviolet radiation.»

The star has emitted a flare that made it 68 times brighter than usual, and could expose any life on its orbiting Earth - sized planet to fatal levels of ultraviolet radiation.

For artificial lighting throughout the museum, conservators chose novel bulbs that use ultraviolet LEDs rather than the standard blue ones, and different blends of light - emitting phosphors that better approximate natural light when operated at the low intensity needed to avoid damaging fragile pigments.

For example, from laboratory experiments we can determine the amount of amino acids produced per photon of ultraviolet radiation, and from our knowledge of stellar evolution we can calculate the amount of ultraviolet radiation emitted by the sun over the first billion years of the existence of the earth.

Then, while is being irradiated with ultraviolet light, it emits a bluish light, which varies in intensity proportionally to the quantity of methylmercury and inorganic mercury present in the fish,» explains Tomás Torroba, lead author of the paper.

When the plant was exposed to ultraviolet light, it excited electrons in the gold, causing them to emit a violet - blue light.

The problem with today's resist, however, is that it was originally developed for light sources that emit so - called deep ultraviolet light with wavelengths of 248 and 193 nanometers.

In its bulk (non-nanoscale) form, gallium nitride emits light in the blue or ultraviolet range.

These are the glowing remains of the stellar envelope of gas ejected during the AGB phase, which is ionised by ultraviolet radiation emitted by the central star.

Life could eventually spread farther when such stars evolve pass their flare stage, since spectral - type M stars emit much less ultraviolet radiation once they quiet down.

The «colours» are due to differences in the surface temperature of starsw1: hotter stars emit most of their light in the visible blue or ultraviolet regions of the electromagnetic spectrum, whereas cooler stars radiate at longer wavelengths, in the visible red or infrared regions (see Mignone & Barnes, 2011a).

Massive stars emit a large amount of ultraviolet radiation that destroys the molecules and dust surrounding the star and creates ionized gas, which in turn impedes the star's growth process.

The hottest stars also emit a significant fraction of their light in the ultraviolet band and the coolest stars emit a significant fraction of their light in the infrared band.

Some examples of stretchable ultraviolet (UV), visible, and infrared (IR) photodetectors and organic light - emitting diodes (OLEDs) which have stretchability in uniaxial and multiaxial directions are demonstrated by adopting a unique geometric engineering of the layers in the devices.