Sentences with phrase «emission spectrum for»

Is there some emission spectrum for N2 that claims N2 can not emit higher frequencies at higher temperatures (such as purplish blue light)?

-LRB-(Is there some emission spectrum for N2 that claims N2 can not emit higher frequencies at higher temperatures (such as purplish blue light)?)-RRB-

Lots of black body curves but not used to thinking about emission spectrum for a gas.

The expectation from this knowledge is that we should see «holes» in certain bands in the emissions spectrum for the planet and also radiation in these bands should also be radiating back from the atmosphere down to the surface.

Not exact matches

Not even the most intense meteor storms on Earth have produced as strong a response as this one: The emission dominated Mars» ultraviolet spectrum for several hours after the encounter and then dissipated over the next two days, according to the MAVEN science team.

Prof Atatüre says «We chose WS2 because it has higher bandgap, and we wanted to see if different materials offered different parts of the spectra for single photon emission.

Using the Very Large Telescope UV - Visual Echelle Spectrograph, the researchers obtained a spectrum of the star's light and looked for emissions from ionized iron, similar to those from the sun.

With such a relatively low mass for the central black hole, models for the emission from the object can not explain the observed spectrum.

«The backward - enhanced plasma emission spectrum from water droplets or biological agents,» they write, «could be attractive for remotely determining the composition of atmospheric aerosol.»

His research culminated in the first observed emission spectrum of an extrasolar planet and revealed tantalizing evidence for the composition of the planet's atmosphere.

The latter is aimed for use in the infrared emission spectrum.

Okay, one little nit - picky issue with Q2 is that O2 and N2 actually DO absorb infrared radiation, just at shorter wavelengths than matter for the Earth's infrared emission spectrum (3 - 27 microns, with a peak around 9 microns or so).

See Table 1 for a summary of Rosella's excitation and emission spectra.

For example, 59 Cygni is listed as spectral type B1.5 Vnne, [34] indicating a spectrum with the general classification B1.5 V, as well as very broad absorption lines and certain emission lines.

mK - GO matures from green to red, and the FT series matures from blue to red (see Table 1 for emission and absorption spectra).

A narrow band of them in the high - energy spectrum would be a «smoking gun» for the presence of dark matter, says Michelson, but he thinks it's more likely that the dark matter emission would be mixed in with gamma rays from other energy sources in the universe and that scientists such as GLAST pioneer Elliott Bloom will have to work very hard to untangle the GLAST data to find it.

Taken together, the spectral shift of the peaks and the emission spectrum broadening allows for significant excitation into the optical window for intravital and whole - body imaging applications.

The Tol2 Gateway - Compatible Toolbox is based on the original Tol2kit generated by the Chi - Bin Chien lab (Kwan et al., 2007) and includes four promoters, six fluorophores with nonoverlapping emission spectra (N - and C - terminal tags for mTagBFP, TagRFPt, EGFP, mVenus, mCerulean3, mKOFP2) and empty vectors that have standard cloning sites or gateway compatible cloning sites for easy cloning of your genes of interest.

Request for clarification from a retired engineer: when it's said that methane is N times the greenhouse gas that CO2 is, is that purely taking into account their absorption spectra relative to the blackbody emission from the surface, or does it take into account saturation as well, since methane constitutes a much smaller percentage wrt CO2?

The reason for this is as follows: Carbon dioxide has three absorption bands at wavelengths of 4.26, 7.52, and 14.99 micrometers (microns).13 The Earth's emission spectrum, treated as a black body (no atmospheric absorption), peaks at between 15 and 20 microns, and falls off rapidly with decreasing wavelength.

Okay, one little nit - picky issue with Q2 is that O2 and N2 actually DO absorb infrared radiation, just at shorter wavelengths than matter for the Earth's infrared emission spectrum (3 - 27 microns, with a peak around 9 microns or so).

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).

That means the emission probability for excited CO2 (and water vapor) is significantly greater than zero and explains the observed emission spectra which show strong CO2 (and water vapor) emission spectral features rather than the continuum emission that would be expected if nitrogen emission dominated.

In the past, the IPCC prepared an entire spectrum of possible emissions scenarios for this century.

It seems to me that any layer from the surface to the highest limits of the atmosphere is radiating some roughly blackbody looking spectrum corresponding to its own Temperature; and much of that spectrum exits directly to space (assuming cloudless skies for the moment) with a spectrum corresponding to the emission temperature of that surface; but now with holes in it from absorption by GHG molecules or the atmospheric gases themselves.

Because it produces roughly half the CO2 emissions of coal, natural gas has been considered as a bridge fuel to zero - carbon energy supplies by Al Gore, the Natural Resources Defense Council, Resources for the Future, former Environmental Protection Agency head and former Obama climate chief Carol Browner, and energy experts across the political spectrum.

Second, robotic probes have measured Venus» atmosphere to be about 97 % CO2, and we can see from the image above (click for a larger version) that the absorption spectrum for CO2 (at Earth temperature and pressure — Venusian temperature and pressure increases the width of the absorption bands, making CO2 a stronger absorber in Venus» atmosphere than in Earth's) strongly overlaps the peak emission spectrum of Venus» surface.

Attempts to significantly influence climate impacts based on just controlling CO2 and a few other greenhouse gases emissions is an inadequate and incomplete policy for this purpose.The goal should be to seek politically and technologically practical ways (with minimal cost and maximum benefit) to reduce the vulnerability of the environment and society to the entire spectrum of human - caused and natural risks including those from climate, but also from all other environmental and social threats.

Emissivities were evaluated experimentally based on direct measurement of total emission for a number of gases including CO2 and water vapour; these gases absorbed in certain regions of the IR spectrum and this was the data which was used.

It will not follow the «supposed» N2 spectra for emission at all.

Perhaps that has been done for HITRAN's calculations of the absorption and emission spectra of different materials in the laboratory, but I think it can not have been done for its calculations of CO2's absorptions and emissions in the atmosphere because (fortunately for all life on the planet) the atmosphere can not be placed in a laboratory.