Sentences with phrase «radiation at infrared wavelengths»

This was necessary because if the telescope were not cooled down, its own thermal radiation at infrared wavelengths would swamp the much fainter radiation from astronomical objects.

The researchers will use the probe, which will measure radiation at infrared wavelengths, to study the evolution of galaxies.

Not exact matches

When the team looked at the overall balance between the radiation upward from the surface of the ice sheet and the radiation both upward and downward from the upper levels of the atmosphere across all infrared wavelengths over the course of a year, they found that in central Antarctica the surface and lower atmosphere, against expectation, actually lose more energy to space if the air contains greenhouse gases, the researchers report online and in a forthcoming Geophysical Research Letters.

Early in their lives, the radiation they emitted was largely blocked by the thick veil of their host nebula, visible only to telescopes at infrared and radio wavelengths.

Charged particles striking Saturn's upper atmosphere ionize hydrogen atoms and produce infrared radiation, whereas related processes also give off Saturnian auroras at ultraviolet and radio wavelengths.

In 2009, the Spitzer Space Telescope discovered infrared radiation from a ring far beyond all the others encircling Saturn; sunlight heats the ring's dust, which emits its heat at infrared wavelengths.

They found that HD 98800, which is an orange star, emits 10 per cent of its radiation in the far - infrared — at wavelengths between 10 and 100 micrometres.

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).

If the surface plus atmosphere together acts as a gray body at 288 K with e = 0.61, then only 61 % of incoming solar radiation at thermal infrared wavelengths (a small fraction of the total) will be absorbed.

After a series of brief studies by infrared instruments carried on sounding rockets had detected about 4,000 celestial sources of infrared radiation, the United States, the United Kingdom, and the Netherlands built IRAS to map the sky at infrared wavelengths of 12, 25, 60, and 100 micrometres.

We also expect to see more infrared radiation returning back to Earth at these same wavelengths.

The sun, which is quite hot (about 5800K), emits most of its energy at between 0.2 microns and 4 microns (solar or short wave radiation, or plain sunlight), while the Earth's surface emits the most energy at wavelengths between 5 and 50 microns (the so - called thermal Infrared region of the 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).

As far as I know, if the only physical mechanism under consideration is the radiative cooling of the planet's surface (which was heated by shortwave solar radiation and reradiated at longer wavelengths in the infrared) via radiative transport, additional gas of any kind can only result in a higher equilibrium temperature.

graph 2 «99 % of sun's radiation fall between 0.2 — 5.6 um; 80 % — 0.4 — 1.5 um» and those wavelengths have an energy peaking at 10 ^ 9 times as much energy at the visible wavelengths compared to the peak energy of the infrared wavelengths emitted by the earth.

The infrared spectrum: «Infrared (IR) light is electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 0.74 micrometres (µm) to 300 µminfrared spectrum: «Infrared (IR) light is electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 0.74 micrometres (µm) to 300 µmInfrared (IR) light is electromagnetic radiation with longer wavelengths than those of visible light, extending from the nominal red edge of the visible spectrum at 0.74 micrometres (µm) to 300 µm.»

This quantity represents the difference in the intensity of the long - and short - wave infrared radiation at these two wavelengths that travels upward from the atmosphere to the satellite, and it is traditionally used to differentiate between water and ice clouds.

This must result in about 85 times as much infrared radiation from the Sun, at 3.3 microns wavelength, being sent back into space by the absorption and re-radiation from methane molecules in the upper atmosphere as could be re-radiated into the lower atmosphere for infrared radiation sourced from the warmed Earth.

Radiation comes in from the sun (solar radiation at short wavelengths), and every body radiates according to its temperature (proportional to the fourth power of absolute temperature), so that on Earth we, and the surface and atmosphere radiate at infrared wavelengths.

Radiation at ultraviolet wavelengths dissociates atmospheric molecules, initiating chains of chemical reactions — specifically those producing stratospheric ozone — and providing the major source of heating for the middle atmosphere, while radiation at visible and near - infrared wavelengths mainly reaches and warms the lower atmosphere and the Earth's surface1.

In the real world; that being the laboratory where CO2 does its dastardly deed on our climate, the source of the energy that purports to do the heating, is (on average) a black body like source of Long wave infrared radiation having a spectral peak at about 10.1 microns wavelength, and containing about 98 % of its energy in a range of about 5.0 to 80 microns wavelength, at an effective Temperature (on average) of 288 Kelvin.

Greenhouse Gas (GHG)- Geenhouse gases are those gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of thermal infrared radiation emitted by the Earth's surface, the atmosphere itself, and by clouds.

They were startled, however, to find that the crystal absorbed dozens of times more radiation at relatively short infrared wavelengths than did an ordinary tungsten film.

Both, however, are efficient at intercepting outgoing infrared radiation from the Earth's surface and atmosphere The disparity is due to the different wavelengths of incoming solar energy and outgoing infrared energy.

It is possible to measure the infrared radiance in CO2 - band wavelengths via satellite from space, and at ground level for downwelling infrared radiation.