Sentences with phrase «light emitting surface»

Not exact matches

A Giant Galactic Ghost Intrigued by faint blurs on old photographic plates of the Virgo galaxy cluster, a nearby region teeming with galaxies, Oregon's Bothun and colleagues wondered if the apparitions might be smallish galaxies with «low surface brightness» — astronomer - speak for emitting less light per unit area than typical galaxies.

The Sun is close to being a «black body» — that is, the light it emits is very much like that from a hypothetical black surface that absorbs all the radiation falling on it.

LiDAR is a method of mapping from the sky: An airplane - mounted device sends a constant pulse of laser light across a swath of terrain; precise measurements of how long it takes the emitted breams to bounce off surfaces are taken and translated into topographic data.

Geologist John Michell wrote in a letter to the Royal Society that if a star were massive enough, «a body falling from an infinite height towards it would have acquired at its surface greater velocity than that of light... all light emitted from such a body would be made to return towards it by its own proper gravity».

Another disadvantage is the high levels of radiant heat energy produced by high - pressure sodium lamps; up to 75 % of the energy from HPS lamps that is not converted to light is emitted as radiant heat energy, causing the surface of the lamps to reach temperatures as high as 450 °C.

Over a long period the earths surface temperature will remain approximately constant because the amount of heat absorbed as visible light is equal to the amount emitted as infrared light.

«New deposition technique enhances optoelectronic properties of lasers: Yield and efficiency of gallium nitride - based vertical - cavity surface - emitting lasers, a type of laser with potential applications in heads - up displays, automotive headlights, visible light data transmission, improved.»

It absorbs and reemits some light from the surface, but it also emits its own UV light, making it difficult to identify where the photons originated, says Bart de Pontieu, the science lead for IRIS at the Lockheed Martin Solar and Astrophysics Laboratory in Palo Alto, Calif..

YAG (yttrium aluminium garnet) lasers emit ten super-short pulses of light each second, which superheat the paint, blasting it off in chips, rather than heating the surface.

Light can also be scattered: The surface electrons can grab the photon's energy and then eject a photon of the same wavelength, which is how you see pretty much everything that doesn't emit light on itsLight can also be scattered: The surface electrons can grab the photon's energy and then eject a photon of the same wavelength, which is how you see pretty much everything that doesn't emit light on itslight on its own.

From 240 miles above Earth's surface, lightning is visible as bright blotches, and city lights appear as yellow streaks; the atmosphere glows in bands of yellow, green, and red as energetic air molecules interact and emit light, a process (called airglow) that is difficult to see from the ground.

These surface states can act as stepping stones across the bandgap, causing carriers to recombine rapidly without emitting light.

«By chemically modifying the nanotube surface to controllably introduce light - emitting defects, we have developed carbon nanotubes as a single photon source, working toward implementing defect - state quantum emitters operating at room temperature and demonstrating their function in technologically useful wavelengths,» said Stephen Doorn, leader of the project at Los Alamos and a member of the Center for Integrated Nanotechnologies (CINT).

In the past, researchers have focused on maximizing the electrical current flowing inside of the solar cell, rather than maximizing the number of photons emitted when light hits the surface of the cell.

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).

It covers an area of 3000 square kilometers with approximately 1600 surface detector stations which detect cosmic ray shower particles directly, as well as four fluorescence detectors which overlook the atmosphere above the surface array and detect fluorescence light emitted by shower particles.

«By chemically modifying the nanotube surface to controllably introduce light - emitting defects, we have developed carbon nanotubes as a single photon source, working toward implementing defect - state quantum emitters operating at room temperature and demonstrating their function in technologically useful wavelengths,» said Stephen Doorn.

Light shone on the device is converted to surface plasmon, then to exciton, then back to surface plasmon and eventually emitted as light with a shorter wavelength compared to the initial iLight shone on the device is converted to surface plasmon, then to exciton, then back to surface plasmon and eventually emitted as light with a shorter wavelength compared to the initial ilight with a shorter wavelength compared to the initial input.

Stars shining in the night sky emit visible light with a high surface temperature of several thousands to several tens of thousands degrees.

For more serious improvement, lasers such as the VBeam and Excel V emit light that's absorbed by the red pigment in the skin, destroying it underneath the surface.

Its electroluminescent membrane can be switched on at the touch of a button when closed, emitting a pleasant, diffused light over its entire surface.

Unlike LEDs, which emit their light in the form of points, OLEDs light up over their full surface with a homogeneous effect.

Infrared touch technology can be applied on any flat surface like a Liquid Crystal Display (LCD), Organic Light Emitting Diode Displays (OLED), Electronic Paper Displays (EPD) such a E-Ink, and Mouse Pad.

As an added bonus, the way in which the technology works also makes e-paper displays reflective, which means that the light from the environment is reflected from the surface of the display towards the user's eyes, just as with traditional paper, with the display emitting no light itself.

In addition to the manipulations of the image surface caused by the basin's circular motion, loud speakers emit low - frequency sounds that cause vibrations and ripples, further distorting the reflection and making the lights» straight lines waver and curve.

Although Donald Judd sometimes went after some fairly fancy finishes, Minimalism in general was not about finish and surface (yes, call it what it is), but about objectness, even when that objectness is expressed by store - bought fluorescent lights and was in part defined by the light emitted as well as the fixtures and tubes.

Appearing as a relic of a bygone era and removed from its everyday function the work becomes a vessel emitting interactive light that brightens or dims depending on the viewer's proximity to its surface.

The canvases push color towards a third dimension — the space outside the canvas — in the form of light emitted from its surface.

Even the surface of Mercury with sun heated surface of 725 K isn't hot enough to emit IR light which this camera could see.

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.

It is indicated that Earth surface adsorbs 168 W / m ^ 2 of solar radiation in visible light region, but emits 390 W / m ^ 2 in LW region (from which 324 W / m ^ 2 is returned as «back radiation»).

Next: «Solar radiation at the frequencies of visible light largely passes through the atmosphere to warm the planetary surface, which then emits this energy at the lower frequencies of infrared thermal radiation.

However, as the Earth's surface and atmosphere heat up, they also emit more light.

This high frequency light comes in, hit the cold surface, warms it up a bit and emits a black body spectrum of frequencies outward, most of these being below our cutoff frequency of our shell.

You can shine 100 100 - watt light bulbs on a surface, and you still will not get that surface to emit even 100 watts.

jae says: «You can shine 100 100 - watt light bulbs on a surface, and you still will not get that surface to emit even 100 watts.»

Energy emitted by the earth's surface equals energy it absorbed from direct sunlight plus energy it absorbed from the atmosphere (also emitting light, e.g. infrared).

On the surface it seems to imply that the frequency of light is merely the frequency that identical photons are emitted by the source.

One suggestion he came up with was that the energy coming in from the sun in the form of visible and ultra-violet light (known back then as «luminous heat») was easily able to pass through Earth's atmosphere and heat up the planet's surface, but that the «non-luminous heat» (now known as infra - red radiation) then emitted by the Earth's surface could not make it back in the opposite direction quite so readily.

Organic light emitting display screens, also called OLED or AMOLED screens, offer a sharper display and curve around the phone's edges, rather than lying flat on its surface.

The light source may be a laser, such as a vertical - cavity surface - emitting laser (VCSEL) or other suitable semiconductor laser diode.

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

In part, this is due to the change in domestic light sources: where once the ubiquitous tungsten bulbs gave off a yellowish glow — well suited to off - white shades such as magnolia — the LEDs and halogen bulbs that replaced them emit a cooler light, which, when teamed with dark surfaces, creates a snug, embracing feel.