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.
His team searched for 18 chemical elements in SDSS J0018 - 0939, a dim orange star in the constellation Cetus that
emits less light than the sun.
At his proposed distance, the 1181 explosion was roughly a fifth as luminous as the 1987 supernova in the Large Magellanic Cloud, a nearby galaxy, that also
emitted less light than the norm.
Not exact matches
Hansen's assessment is simple: we need, as a planet, to be
emitting less carbon dioxide inside of ten years — an enormous task given that China and India are finally beginning to use power in appreciable quantities (and not for luxuries but for the second
light bulb or first refrigerator in a house).
While not quite as efficient as HID
lights, these fluorescents have better color rendering properties (more of the
light emitted is used by the plant) and produce much
less heat when compared to HID
lights.
The innovative thing about OLEDs (for organic
light -
emitting diodes) is that lots of tiny OLEDs can be «printed» onto a single big sheet, allowing engineers to make a digital display that uses
less power than a plasma screen and offers higher contrast, a wider range of viewing angles, and richer colors than an LCD screen.
Despite their blazing appearance, they don't
emit much heat and they're usually
less bright than a 100 - watt
light bulb.
Red areas reflect conditions in which drones
emit less carbon dioxide than trucks (
lighter packages, fewer stops), while blue areas denote conditions in which drones
emit more (heavier packages, more stops).
The CIB glow is more irregular than can be explained by distant unresolved galaxies, and this excess structure is thought to be
light emitted when the universe was
less than a billion years old.
So, does it make sense to replace
less - efficient bulbs with the latest
light -
emitting diodes now, or should you wait for future improvements and even lower costs?
LEDs are also more efficient than fluorescent
light bulbs, which require
less electricity than Edison's invention to excite gases to
emit light.
Smart
lights: In October 2016, the International Space Station plans to replace its fluorescent lightbulbs with new lamps that
emit blue
light by day, and by night,
emit longer wavelengths, which are
less disruptive to sleep.
If that's right, all five planets lie closer to their star than Mars does to ours; however, Tau Ceti
emits only 45 % as much
light as the sun, so each planet receives
less warmth than a planet would at the same distance from our sun.
At this very small scale (
less than 10 atoms), the silver clusters act very differently and can even
emit light.
«The resulting materials could be useful for making faster transistors that consume
less power, or for creating efficient
light -
emitting devices,» Duan said.
«When we analyzed the Keck data, we found the
emitting region of SDSS1133 is
less than 40
light - years across, and that the center of Markarian 177 shows evidence of intense star formation and other features indicating a recent disturbance that matched what we expected for a recoiling black hole,» said Chao - Ling Hung, a UH Manoa graduate student performing the analysis of the Keck Observatory imaging in the study.
The fact that blue
light both activates and inactivates Dronpa is not ideal, since this means Dronpa is quickly inactivated and
less photons are
emitted leading to dimmer fluorescence.
A hot star will
emit a lot of
light in the blue portion of the spectrum (relatively energetic wavelengths), whereas a cold star will mainly
emit red
light (
less energetic wavelengths).
Salt lamps have a nice, soothing quality, and they
emit warmer, red - hue
light that's
less likely to wake up your brain.
For example, the use of
light -
emitting devices immediately before bedtime increases alertness at that time, leading to difficulty falling asleep and
less REM sleep.
Watts in itself mean little as it is the amount of energy required to
emit a certain amount of
light and now that there are different choices from the old plain household incandescent bulb, efficiency has increased so the energy used is
less related to the
light produced.
The headlamps feature
light -
emitting diode technology for bright illumination that requires
less energy, as well as Cadillac's Adaptive Forward
Lighting technology, which turns the headlamps with the direction of the front wheels for greater visibility in turns.
The compact Range Rover 2WD will be the company's
lightest and most fuel efficient model ever made, and it is expected to
emit less than 130 grams...
Since the pixels
emit their own
light the screen consumes
less power and can be made thinner.
E-paper reflects
light instead of
emitting it, which makes it
less power hungry and easier to read in bright sunlight.
The shutter restricting the time and the sensor
emitting more or
less light based on what you want.
For the first time, Noble & Webster are using
Light -
Emitting Diodes (LED) in their work, creating a brighter appearance while using
less energy.
Ockham, a British medieval philosopher, was the original proponent of
less - is - more, and that's what Flavin, who died in 1996, gave us: six vertical fluorescent tubes on a wall, one to the left, two in the center, three on the right, all
emitting immaculate white
light.
While the chandeliers themselves possess sculptural form as objects, demanding a physical encounter, the
light they
emit, variously controlled and directed, is
less tangible, experienced in the spaces between each work and the surrounding architecture, set aglow and appearing to change throughout the day according to ambient
light conditions.
The D.C. composer's «A
Lesser Light» is an «automated improvisation» that randomly
emits bits of music in a theoretically infinite arrangement.
Working with scientists from the Philips
lighting group in Holland, University of California researchers discovered that LED bulbs that
emitted less utlra - violet and blue wavelengths of
light, attracted far
less insects than those that
emitted the more traditionally blue - toned
light.
The processes (absorption of
light, collisional energy transfer and emission) can be separated because the average time that an isolated CO2 molecule takes before it
emits a photon is much longer that the time for collisional de-excitation (~ tens of microseconds at atmospheric pressure,
less, higher in the atmosphere).
LED, or
light emitting diode,
lights use up to 97 %
less energy than their traditional counterparts, so they're a great choice for the energy conscious Christmas lover.
The second major advance in
lighting technology is the
light -
emitting diode, which uses up to 85 percent
less electricity than incandescents.
Green homes typically use more efficient
lighting solutions, including fluorescent bulbs and
light emitting diodes (LEDs), which generate
less heat and more
light per unit of electricity consumed.
If the Sun's temperature was 4000 K, it would
emitting far
less visible
light - it would slightly warmer than an incandescent
light bulb - therefore around 10 % of
light would visible
light rather than about 1/2 of the energy being visible
light.
This result is clearly grossly unfair particularly in
light of the fact that India has
emitted far
less tons of CO2 than most developed countries and therefore is
less responsible for causing the existing problem than many developed nations.
It is better for your wallet, it is better for the nations energy budget, it is
lighter and wears
less on the roads, it requires
less parking space,
emits less pollution, which again creates
less health problems.
A non-black body will absorb and
emit light less well at some (or all) frequencies.
MicroLED panels use different
light -
emitting compounds than the current OLED displays and should help to make future devices slimmer, brighter, and
less power - hungry.
MicroLED screens use different
light -
emitting compounds than the current OLED displays and promise to make future gadgets slimmer, brighter and
less power - hungry.
OLED displays inherently
emit less blue
light than LCD displays, but not so
less as to not strain our eyes with continued usage, especially at night when it can also induce sleeplessness.
The pixels of such an advanced LCD panel are said to
emit more
light than standard LCD panels, but they consume 40 percent
less power.
MicroLED displays use different
light -
emitting compounds than the current OLED displays and reduce size and weight while helping saving more power by consuming
less power.
What happens here is that some of the blue
light emitted from the screen is filtered out, which makes it
less problematic when it comes to using the phone at night.
The sign that was recently installed is the biggest corporate brand sign of its kind in Toronto using LED (
light -
emitting diode) technology that uses lower power consumption and has greater longevity, costing 25 per cent
less than most signs that use neon composed gas - filled glass tubes.