Sentences with phrase «excited by radiation»

I did not claim that the Atmosphere, after being excited by radiation coming up from the Surface, emits down towards the Surface and up towards Space exactly like a black body, just that it emits at a variety of wavelengths.

Not exact matches

Instead of relying on light waves emitted by electrons, it would use radiation emitted when the nucleus is excited to a high energy state, and then drops into a lower energy state.

They can also be used for biological labeling because of their low toxicity, chemical stability, and intense luminescence when excited by near - IR radiation, which can penetrate tissue much better than higher energy radiation such as ultraviolet, as is often required with quantum dot labels.

Fanged frogs present an even more exciting challenge, he says, because their diversification likely was influenced not only by the dynamic tectonics of Sulawesi, but also by adaptive radiation via ecological diversification.

The team at the Institute of Radiation Biology led by Mike Atkinson and Natasa Anasasov have identified several more radiation regulated long non-coding RNA molecules, and are staring to unravel this exciting new aspect of the radiation response.

That the nebula is so much brighter than the star shows that the star emits primarily highly energetic radiation of the non-visible part of the electro - magnetic spectrum, which is absorbed by exciting the nebula's gas, and re-emitted by the nebula, at last to a good part in the visible light.

Like the main nebula M42, this is an emission nebula, shining by the light emitted from its atoms, after being excited by the high - energy radiation of massive, very hot young stars within it.

The molecules of CO2 become excited, and can lose this excitation energy via radiation of slightly longer wavelength IR in all directions, or by colliding with other molecules.

Although that will be true in the mid atmosphere, do you agree that is not the case near the surface of the Earth where the greenhouse molecules are being excited by blackbody radiation from the Earth's surface, but are being relaxed by collisions with other air molecules such as N2 & O2?

For instance the transition momentum from the ground state to the first excited bending state of CO2 by absorption of 15µ radiation is [PSI (ground) µ PSI (1)-RSB- where µ is the dipolar momentum.

It goes on to say that the major components have no dipole moment so that their vibration and rotational energy states can not be excited directly by absorption of radiation, but dipole moments are induced during the collision process.

Again, also, by the way, even if that model were correct it can't be argued that the gas HAS N'T been heated by the radiation because populations exist in the excited state by Tom's own definition.

To make things more exciting I'll raise the temperature of the top wall from 293.15 K to 373.15 K. Two things happen immediately, the temperature of the water vapor goes up by conduction and absorption of radiation from the top wall and so does the temperature of the surface of the water.

4) As I understand it, the ~ 15μm radiation from the Surface to the Atmosphere is absorbed by H2O and CO2 molecules which, when excited, bump into nitrogen and oxygen and other air molecules, and heat the air.

Ira — regarding your summary comment 4) at May 8, 2011 at 7:51 pm my comment — NO, the atmosphere does NOT emit LWIR across a distribution of wavelengths like a blackbody, see my earlier comment at Dave in Delaware says: May 8, 2011 at 7:00 am Ira Glickstein, PhD says: «4) As I understand it, the ~ 15μm radiation from the Surface to the Atmosphere is absorbed by H2O and CO2 molecules which, when excited, bump into nitrogen and oxygen and other air molecules, and heat the air.

: it's because it has a dipole moment as it is NOT a symmetric molecule, like O2 or N2, so it has bending modes that can be excited by infrared radiation); more water vapor = more greenhouse warming, again * all other things being equal *.

They are not excited by short wave solar radiation and trickle down the energy levels until they emit in the IR (your model).

mkelly says: March 1, 2011 at 8:44 am Dave Springer says: March 1, 2011 at 7:53 am «Nitrogen doesn't absorb infrared radiation but it can certainly gain kinetic energy by excited molecules of CO2 and H2O bumping into nitrogen molecules.