Sentences with phrase «emitted no light before»

This is a period when the early Universe emerged from its dark ages the Universe emitted no light before gravity condensed matter into the first stars and galaxies.

Not exact matches

Because our smartphone and computer screens emit blue light, when we stare at them before bed we are resetting our body's internal clock, making it more difficult to fall asleep.

Scientists note that «the use of light - emitting devices immediately before bedtime is a concern because of the extremely powerful effect that light has on the body's natural sleep / wake pattern and how that may play a role in perpetuating sleep deficiency.»

It also appears that many kids are losing sleep because they are using blue - light emitting electronic devices before bedtime.

This humidifier uses ultra-violet light technology to kill bacteria, mold, fungus, and virus in the water which is then absorbed by the wicking filter before emitting an invisible mist.

But the images suggest that scientists will want to take advantage of the DNB's images in multiple ways: not just to study clouds, but also to assess disasters such as power outages (such as before and after Superstorm Sandy last month), to study gas flares and estimate volumes of CO2 emissions, or to keep an eye on illegal unreported fishing (the boats emit light to draw in their stocks).

Challenges remain before light - emitting ceilings can become common.

Metaphorically speaking, the lattice acts as a magnet for photons, extracting them (white arrow) from the light - emitting region before they can be reabsorbed.

Lately, however, scientists have been cautioning against using light - emitting devices before bed.

But in the video, the filaments and fin rays also appear to emit light at their tips and at intervals along their length — something that's never been seen before.

It is known, that quantum - dot based LEDs, or QLEDs, can suffer from «droop,» or reduced efficiency, at high pumping intensity due to processes that dissipate the energy of excitons before they have time to emit light.

Hours after the universe was created (and before the universe was stretched out), so many quasars were near us that unimaginable amounts of light were emitted.

A new study by researchers at the University of Houston College of Optometry published in the journal Ophthalmic & Physiological Optics found that while the blue light emitted from digital devices could be contributing the high prevalence of reported sleep dysfunction, participants who wore short wavelength - blocking glasses three hours before bedtime for two weeks experienced a 58 % increase in their evening melatonin levels.

I also found a ton of tips for getting better sleep — like avoiding blue light before bed (yep, that's exactly the kind of light our phones emit), cutting out caffeine, and getting out of bed when insomnia strikes — so I decided to give them a try.

[pagebreak] De-tech your bedroom Its tempting to cozy up with your Kindle Fire or iPad as you drift off to dreamland, but researchers say we should turn off TVs, laptops, and backlit tablets an hour before bed, since exposing yourself to light - emitting gadgets at night suppresses your bodys production of the sleep - inducing hormone melatonin.

Researchers from Brigham and Women's Hospital in Boston found that subjects who used light - emitting e-readers before bed had a harder time falling asleep, lower levels of sleep - promoting hormones, and shorter and delayed REM sleep — all of which reduced their alertness levels in the morning.

A recent study found that people who read from light - emitting reading devices usually have a harder time falling asleep and don't sleep as deeply compared to those who read from a physical book before bed.

Avoid blue - light emitting devices (smartphones, tablets and TVs) for an hour before bedtime for the best sleep.

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.

Avoid exposure to light for a two hour period before bedtime, particularly blue light emitted by electronics such as TVs, laptops, ipads, and blackberries.

A sleep poll shows 95 percent of Americans uses some kind of light - emitting device at least a few nights a week before bed, making this a national concern.

Numerous studies have shown that people who read on blue light - emitting devices took longer to fall asleep, reduced REM, and had heightened vigilance before going to sleep.

If you have never heard about this before, basically it suppresses the blue light that emits from behind the screen, making it easier to read e-books, magazines, newspapers or even your favorite website.

A team from Harvard Medical School compared reading paper books and light - emitting e-readers before sleep.

A new Harvard study is re-affirming the assertion that reading light - emitting e-books before bed, like computer tablets, could have a detrimental effect on sleep, which can in turn lead to serious health problems.

I can't read more than a few paragraphs in a long story before starting to skip ahead on a glowing light emitting screen.

Researchers from Harvard Medical School compared reading a classic paper book to light - emitting e-readers right before bed, and published their findings in the Proceedings of the National Academy of the Sciences.

According to a medical research, reading a light - emitting e-book before bed can interfere with your ability to sleep and thus affects overall health.

This feature was created based on research that shows using tech that emits blue light before bed affects sleep quality due to its activating effects.

A new study, published in the journal of the Proceedings of the National Academy of Sciences (PNAS), has found that reading light - emitting eBook before sleep can compromise the quality and length of your sleep amongst other things.

The paper assessed two groups; half read a normal printed book for four hours before bedtime for five consecutive nights, while the other group read a light - emitting ebook reader for the same period.

Because the Kindle display emits no light, your family can read before bedtime without losing sleep.

They are lightweight, have yellow tinted lenses and as stated before, are designed to block harmful blue light emitted from computer monitors, televisions, cell phones and other mobile devices.

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).

The second is the urgency of the need for hard - to - imagine action to dramatically reduce greenhouse gas (ghg) emissions at all scales, that is globally, nationally, and locally, but particularly in high - emitting nations such as the United States in light of the limited amount of ghgs that can be emitted by the entire world before raising atmospheric ghg concentrations to very dangerous levels and in light of the need to fairly allocate ghg emissions reductions obligations around the world.

Because the molecules in a gas are constantly moving about and colliding with each other, it is very likely that some nearby nitrogen or oxygen molecule will collide with our excited infrared - active gas molecule before it has a chance to emit its light.

Like the Nanoleaf bulbs that came before them, the Nanoleaf Ivy smart bulbs are 3D - printed jigsaw assemblies with light - emitting diodes on the outside.

It's true that LEDs (short for Light - Emitting Diode) can last a very long time, but the circuitry inside of an LED bulb is way more complex than anything ever seen in a light bulb before — especially with dimmable LED bulbs, which require even more circuLight - Emitting Diode) can last a very long time, but the circuitry inside of an LED bulb is way more complex than anything ever seen in a light bulb before — especially with dimmable LED bulbs, which require even more circulight bulb before — especially with dimmable LED bulbs, which require even more circuitry.