Sentences with phrase «emitted by the molecules»

The fluorescent light emitted by the molecules is observed through the glass plate using a microscope.

Radiation is emitted by molecules based on their individual (internal + kinetic) energy, not by the temperature of the body or volume of gas that molecule is a part of.

However, radiation emitted by a molecule within a solid will generally be absorbed by the immediately neighboring molecules: it doesn't get very far.

Most of the radiation measured as coming from the ocean surface is actually either been reflected or is being emitted by molecules evaporated from the ocean surface.

Not exact matches

These molecules initially comprise just a small fraction of the gas, but they can absorb heat from the surrounding gas and get rid of it by emitting light, thereby cooling the cloud enough for stars to form.

«What we can observe is the gas itself, because the molecules are excited by the heat from the stars and therefore emit light in the infrared and microwave range.

To construct the solar cell, the semiconductor molecules are deposited as thin films on glass with the same production methods used by organic light - emitting diode manufacturers.

ALMA picks up light emitted by glowing dust in SDP.81 and also sees signs of carbon monoxide and water molecules in the ring, helping astronomers determine its structure and internal motion.

PET employs the antiparticle of the electron, the positron, that is emitted by radioactive elements which can be attached to biologically active molecules that target specific sites of the body.

By scanning through the sample, plane after plane, researchers can gather the fluorescence signals emitted from molecule - bound dyes over the entire depth.

Using ALMA's ability to detect the faint millimeter - wavelength «glow» emitted by gas molecules, Isella and his team discovered that there was also an appreciable dip in the amount of CO in the outer two dust gaps.

The lower left image shows new molecules — created by scientists at the University of Utah and two German universities — that are shaped like wagon - wheel or rotelle pasta and emit light more efficiently than the spaghetti - shape polymers.

They are the resonant frequencies emitted by the more abundant molecules and free radicals m interstellar space.

Since Lew Snyder and David Buhl discovered interstellar formaldehyde in 1969, astronomers have identified more than 150 molecules in deep space, mostly by using radio telescopes to detect the faint radiation the molecules emit.

The telescope will also be able to register the radio waves emitted by water masers, clouds of water molecules that emit microwave radiation, in the discs of galaxies.

Air pollutants interact with and break down plant - emitted scent molecules, which insect pollinators use to locate needed food, according to a team of researchers led by Penn State.

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.

As the zinc shoots out, it binds to small molecules which emit a fluorescence which can be picked up by camera microscopes.

(1) Like other molecules, QD emit a wavelength of light in specific response to excitation by a different wavelength, but the light they emit depends on their size.

The «family» of radio frequencies emitted by a particular molecule forms a unique «fingerprint» that scientists can use to identify that molecule.

I'm a physical chemist, and I was interested in trying to control how molecules emit light by placing them in confined spaces.

The scientists studied the star - forming clouds by analyzing radio waves emitted at specific, known frequencies by molecules within the clouds.

Because the molecules emit radio waves at specific frequencies, shifts in those frequencies caused by motions (called Doppler Shift) can be measured, revealing the direction in which the gas is moving relative to Earth.

Presumably, the strong stellar wind emitted by giant stars eventually blows the titanium oxide out of the star's outer regions (along with hydrogen and helium gases and dust made of elements and molecules like carbon) into interstellar space, until vigorous convection brings out more titanium and oxygen that are created from nuclear processes deeper in the star.

Methods: In this new approach, the team began with an atmospheric aerosol sample that contains thousands of molecules formed in the reactions of ozone, a common atmospheric oxidant, with limonene, a molecule emitted by various types of trees, which is responsible for the citrus scent found walking among the orange trees.

The team used the two radio lines emitted by water molecules at the frequencies of 321 GHz and 336 GHz, which are thought to correspond to gas temperatures of 1700 and 2700 degrees Celsius, respectively.

Numerous molecules emit radiation at these wavelengths and thus can be detected by the 12 - Meter telescope.

From what I gather, the ocean, being the huge black body it is, emits a heck of a lot of radiation, a small portion of that gets absorbed by the occasional water vapor molecule (which probably also came from the ocean) or CO2 molecule (which also may have come from the ocean).

The researchers used satellites to measure heat in the form of microwave radiation emitted by oxygen molecules in the atmosphere from 1979 to 2005.

All urine odors are caused by molecules that emit a vapor.

«OK, I know I am going to regret this, but by what mechanism does a molecule emit in the IR if it can not absorb in the IR?»

What I'm saying is that TOA, as far as radiative energy is concerned, for CO2 or other IR absorbing gas, is effectively the altitude where the chance that a photon will be absorbed, and emitted back in a direction that will lead it to being absorbed again by a molecule in the atmosphere, becomes negligible.

How far does an emitted photon travel before it is absorbed again by another molecule?

PS when molecular collisions are frequent relative to photon emissions and absorptions (as is generally the case in most of the mass of the atmosphere), the radiant heat absorbed by any population of molecules is transfered to the heat of the whole population within some volume, and molecules that emit photons can then gain energy from other molecules.

Thus per man - emitted molecule floating around in the atmosphere, CH4 is 28 - times more potent than CO2 (pedantically as of 2011, but it won't vary significantly by the century).

Peter@134 OK, I know I am going to regret this, but by what mechanism does a molecule emit in the IR if it can not absorb in the IR?

idlex, one thing you are missing is that most CO2 molecules relax not by emitting a photon by by colliding with, say a Nitrogen, molecule and imparting the extra energy to that molecule.

What will the energy of the radiation emitted by a CO2 molecules in the atmosphere at NTP, and does it depend on the temperature of the air?

You merely have to say that it's * physics *, and if they are technically - educated explain the general thrust of this physics (e.g. triatomic or larger molecules, which are scarce in the atmosphere, generally have vibrational modes that will be active in the IR, where Earth emits due to Wien's law, and thus will act as a blanket or lid, and Earth would be 255K = -18 C = 0F by Stefan - Boltzmann if this weren't the case) and they go, «Oh, ok!

Almost immediately (nanoseconds) they relax from their excited state by either 1) emitting that energy as a new photon, some of which will continue up towards space, some of which will go back downward to be reabsorbed, thus keeping the energy in the atmosphere longer, or 2) by colliding with another gas molecule, most likely an O2 (oxygen) or N2 (nitrogen) molecule since they make up over 98 % of the atmosphere, thereby converting the extra vibrational energy into kinetic energy by transferring it to the other gas molecule, which will then collide with other molecules, and so on, making the air warmer.

His conclusion was that the CO2 forcing is unquestionably logarithmic, so that each additional molecule we emit has less forcing and warming effect than its predecessors; that the precise value of the coefficient in the CO2 forcing function, which the IPCC has already reduced by 15 %, can not be determined; and that, all things considered, 1 K per doubling was probably in the right ball - park.

By the same token, in collisions even symmetrical molecules like N2 or O2 can exhibit an accelerating electric charge and therefore emit EM radiation in a continuum spectrum.

It is, effectively, at the blackbody radiation temperature (and all molecules including N2 and O2 absorb and emit blackbody radiation — this seems to not be understood by many).

The Sulfur Dioxide Analyzer measures sulfur dioxide based on absorbance of UV light at one wavelength by SO2 molecules which then decay to a lower energy state by emitting UV light at a longer wavelength.

If we accept that the elevated GHG effect is 28 times that of CO2 and the residence time of CO2 in the atmosphere is 100 years, one molecule of methane emitted by a cow is equivalent to an excess of GHG effect equivalent to the addition of 2.8 molecules of CO2 to the atmosphere.

Ozone - depleting substances are emitted by human activity at the planet's surface and eventually travel to the stratosphere, where there the chlorine atoms and certain other constituent parts break apart the three oxygen atoms that make up an ozone molecule.

The «notch» is caused by molecules absorbing and subsequently emitting IR photons in all directions.

Describe Global Warming The sun is emitting heat rays that is absorbed by the green house gas molecules once it reflects.

Strictly speaking there is a small probability that a molecule at the surface that has just absorbed a photon will emit again before it can transfer the energy by collision with other molecules, but that probability is very small, < 1E - 04.

These reactive molecules are emitted by marine algae and liberated from salty sea spray.