Sentences with phrase «which absorbs some wavelengths»

Not exact matches

(Not all organic sunscreens absorb both UVA and UVB rays, which have different wavelengths, so it's important to pick «broad spectrum» versions that protect against both types.)

It is the first laser lipolysis technology that uses three wavelengths which are all absorbed by fat.

Colours in nature normally come from pigments, which absorb most light wavelengths, except for ones that they reflect to give the colour we see.

Unlike pigments, which create color by absorbing some wavelengths of light and reflecting the rest, the nanostructures are shaped so that they physically bend and scatter light in different directions, sending particular colors back to our eyes.

This material, in which carbon substitutes for some of the lattice oxygen atoms, absorbs light at wavelengths below 535 nanometers and has a lower band - gap energy than rutile (2.32 versus 3.00 electron volts).

Our colour vision depends on proteins that contain chromophores — chemicals which absorb different wavelengths of light.

By seeing which wavelengths are absorbed as the starlight passes through the planet's atmosphere, astronomers could determine whether the atmosphere contains water, carbon monoxide, methane, and carbon dioxide.

Natural chromophores have a maximum absorption of around 560 nanometres, but one of the team's 11 modified chromophores was able to absorb red light with a wavelength of around 644 nm — tantalisingly close to infrared, which starts at about 750 nm (Science, doi.org/jxn).

The wavelengths of the absorbed light reveal how the target molecule's chemical bonds vibrate, which in turn tells about the types and positions of atoms in the molecule, the kinds and strength of bonds among atoms and the symmetry of the molecule, Milo says.

The extra height will get them above most of the water in the Earth's atmosphere, which absorbs some of the infrared wavelengths they're interested in.

One of the prime explanations for this low reflectivity — an abundance of minerals including the element iron, which strongly absorb certain wavelengths of light falling upon them — doesn't fit in this instance, researchers say.

Upon exposing a metallic surface to electromagnetic radiation that is above the threshold frequency or threshold wavelength (which is specific to the type of surface and material), the photons are absorbed and current is produced.

«Light at certain wavelengths can be absorbed out of a thin optical waveguide by a microresonator — which is essentially a tiny glass sphere — when they are brought very close,» explained Gaurav Bahl, an assistant professor of mechanical science and engineering at Illinois.

Plants and algae use chlorophyll to absorb energy from the Sun to power photosynthesis at wavelengths up to 720 nm — which is in the red part of the light spectrum, at the limit of visibility to the human eye.

These so - called starbursts are difficult to observe from Earth, as their dusty shrouds absorb much of the optical light from the stars and re-radiate it as longer - wavelength radiation to which Earth's atmosphere is mostly opaque.

To maximize energy absorption for photosynthesis, especially when the suns have vastly different colors or if at least one of the suns is dim, plants — or, more correctly, their extraterrestrial analogs — may use one or more types of light - absorbing pigments that absorb across a broad range of wavelengths, which would tend to make the plant appear black or gray (main image).

The principle idea is to use a radio telescope to map neutral hydrogen, which emits or absorbs radio waves with a wavelength of 21 centimeters.

Cloud droplets absorb certain wavelengths of light depending on their size, so noting which wavelengths are missing in readings reveals the size of the droplets present.

«When an exoplanet passes in front of its star, light can be absorbed at some wavelengths by molecules in the atmosphere, which we can analyze by looking at how light passes through the planet's atmosphere,» said Benjamin Charnay, a postdoctoral researcher in the University of Washington Department of Astronomy.

The standard explanation for this is that the atoms in the atmosphere of the star absorb some of the light which is emitted, and each element absorbs only some distinct, characteristic wavelengths of light.

Few deep - living species have the ability to detect yellow light, which, because it has a higher wavelength, gets absorbed in the shallow surface waters, so it is unclear why Tomopteris uses it.

After six months in the lab, Butler emerged with harmless iodine gas, which absorbs light at even more wavelengths.

Fortunately, astronomers have been able to use longer radio wavelengths that are not absorbed by the obscuring dust and radiowave - emitting molecules like carbon monoxide (which are concentrated in the spiral arms) to trace the spiral disk's structure.

Spectrometers can be tuned to detect the wavelengths at which scientists know a given element emits and absorbs light; scientists can then determine the element's presence by whether it emits or absorbs light of certain characteristic wavelengths.

According to CfA, HARPS - N is a spectrograph which separates the light from a star into different wavelengths and different elements absorb light from these wavelengths.

Millimeter / submillimeter wave has longer wavelength than near - infrared light and is poorly absorbed by dust, which enables astronomers to peer into the inner part of the disk.

Furthermore, Solocarbon infrared heat allows for most of the far infrared wavelength to be near 9.4 microns, which is the level at which the human body absorbs infrared energy.

When light encounters a surface, such as the skin, water, or other tissue - types, the wavelength determines which percentage of the light is scattered or absorbed.

So to maintain energy balance the stratosphere must be losing energy via long wavelength radiation which means long wavelength emitters like CO2 must be radiating more than they are absorbing.

For those wavelengths in which the air absorbs effectively (such as the 15 micron CO2 band), surface radiation is effectively replaced by colder emission aloft, and is manifest as a bite in the spectrum of Earth's emission (see this image).

Approaching TOA, the temperature falls toward a skin temperature (see last paragraph of my 340, see Chris Colose's comment for the reason why), which is lower than the brightness temperature of the OLR at the wavelengths at which the skin layer absorbs OLR from below; specifically, the skin temperature is such that, were the skin layer to become very optically thick, the OLR at those wavelengths would drop to half of what they are.

The distance light travels before being absorbed — optical depth — can vary with the light's wavelength and the medium through which is travels.

The first point I'm trying to make is that, in my opinion, if what we are talking about is the wavelength (s) absorbed by CO2, then where the partial pressure (or optical density) of C02 drops to near - 0 is a lot more interesting than where the sum of all gas partial pressures, where the majority of other gases do not absorb at the wavelength of CO2, drops to near - 0, which is the more traditional meaning for TOA.

Warming must occur below the tropopause to increase the net LW flux out of the tropopause to balance the tropopause - level forcing; there is some feedback at that point as the stratosphere is «forced» by the fraction of that increase which it absorbs, and a fraction of that is transfered back to the tropopause level — for an optically thick stratosphere that could be significant, but I think it may be minor for the Earth as it is (while CO2 optical thickness of the stratosphere alone is large near the center of the band, most of the wavelengths in which the stratosphere is not transparent have a more moderate optical thickness on the order of 1 (mainly from stratospheric water vapor; stratospheric ozone makes a contribution over a narrow wavelength band, reaching somewhat larger optical thickness than stratospheric water vapor)(in the limit of an optically thin stratosphere at most wavelengths where the stratosphere is not transparent, changes in the net flux out of the stratosphere caused by stratospheric warming or cooling will tend to be evenly split between upward at TOA and downward at the tropopause; with greater optically thickness over a larger fraction of optically - significant wavelengths, the distribution of warming or cooling within the stratosphere will affect how such a change is distributed, and it would even be possible for stratospheric adjustment to have opposite effects on the downward flux at the tropopause and the upward flux at TOA).

And the whole greenhouse theory is based on longwave IR, and it's the weakest of this energy and huge bandwidth of wavelength with a small section which absorbed by CO2, which makes me doubt that CO2 can have much affect upon global temperature.

Also you focused on re-radiating meaning emitting long - wave spectrum - which possible, but I was thinking more about emitting the same wavelength, as mentioned in this quote: «However, aerosols (which often contain water and if so can absorb red wavelengths) are usually larger than visible wavelengths and therefore absorb and reflect all wavelengths of light equally (this is not technically scattering, although it is often called that; it technically involves absorption and re-radiation, or reflection).»

«Greenhouse gases which are present in the atmosphere absorb and re-emit particular wavelengths of radiation, under particular conditions.

Much of this IR is at wavelengths at which other atmospheric constituents do not interact, so if CO2 is exposed to a warmer surface like the earth, it will absorb radiation that would otherwise pass through into the cold of space AND likewise if CO2 is exposed to the cool of outer space it will emit vast quantities of IR at wavelengths which other gases can not emit.

CO2 (which doesn't contribute much to the heating because it doesn't absorb in UV wavelengths) facilitates cooling by virtue of its ability to emit infrared radiation to space in proportion to local temperature.

A room - temperature cavity resonator produces radiation at a wavelength associated with blackbody temperatures down around absolute zero which is absorbed by hot food to make it hotter.

There might be 3 or 4 molecules of CO2 per 10,000 molecules of air, but at 298K and 50 % RH, there would be 96 molecules of water vapor which absorbs IR at 19 different wavelengths in the IR.

So if on shined that laser on a square meter for say 10 mins then the 1 mm depth of square meter could warm by about 1 C. Rather than water one could also heat up anything with a thin surface [and assuming one reduces the heat loss] So thin sheet of paper which absorbs [has heat capacity of whatever wavelength one is using could heated within mins of exposure.

Like WV and CO2, there is some overlap in which gases absorb what wavelength of radiation.

Re-emitted by the Earth's surface to preserve thermal equilibrium, that radiation is trapped by the overlying atmosphere, which absorbs at those wavelengths (Prob.

As it turns out, specific gases absorb only specific wavelengths of IRR, and some gases have overlapping bands that absorb the same wavelengths which is the topic of the story I posted.

Even snow and ice, which are blinding white at visual wavelengths, are almost black (excellent absorbers) in infrared.

That changes the colour of the water very noticeably meaning that radiation at certain wavelengths which previously would have passed straight through is now absorbed.

Satellites measure less heat escaping to space at the exact wavelengths at which CO ₂ absorbs energy.

how does 6μ to 20μ wavelength of radiative heat energy being absorbed, scattered, diffused what ever mechanism you can invent, by 400 ppm volumetric density of CO2 with molecule size of 3.2 Angstrom, which means your purple ball size is ~ 1/3000 of your sun light yellow ball at atomspheric temperature of 15 C?

The molecule will first use the heat energy in expansion and on cooling will again condense and sink because heavier, and it will cool when its heat expanded volume flows to colder air which absorbs the heat, the internal kinetic energy of vibration, which if strong enough will pass that heat to another colder (which is why visible light is not a thermal energy, it is not powerful enough to move a molecule of matter into vibration, it takes the bigger heat wave, longwave infrared, aka thermal infrared called that because it is the wavelength of heat)-- that is how convective heating warms the fluid gas air in a room, by circulation, in the rise and fall of molecules as they expand and condense, not by heat energy propelling molecules to hit other molecules..