Sentences with phrase «thermal infrared spectrum»

A handbook for university students co-written by the chairman [1] of the French National Research Council explains it's the equivalent of a glass window transparent in the visible spectrum and opaque in the thermal infrared spectrum; but this «analogy» has been, in 1909, experimentally proven wrong by a famous specialist of optics, the professor Robert Wood of John Hopkins University [2].

T0 can be taken as more or less constant near 255 K while P0 is latitude dependent near 400 mbar at the equator, and near the ground in the polar regions (as there there is very little water vapour and the optical thickness of the air on most of the thermal infrared spectrum is low).

Figure 6 - A shows that the water vapour of the air is very opaque over almost all the thermal infrared spectrum, from radiofrequencies at some cm - 1 up to 2220 cm - 1, except in the 350 cm - 1 wide «water vapour window» from 770 cm - 1 to 1180 cm - 1.

Not exact matches

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).

The spectrum of thermal infrared radiation is practically distinct from that of shortwave or solar radiation because of the difference in temperature between the Sun and the Earth - atmosphere system.

I have said that it's the invisible heat from the Sun which heats up the Earth and us.This is the electromagnetic wave on the spectrum called thermal infrared, longwave infrared.

We now call it thermal infrared because we can now do what he couldn't, accurately measure the wavelengths which were heat energy, we can now tell that not all invisible infrared is heat energy; we now know that invisible shortwave infrared is not hot, and neither are the wavelengths of the visible spectrum and UV.

and infrared close to 30,000 nm is call longwave [or very longwave or the far infrared spectrum, or thermal IR - human bodies radiate around 10,000 nm].

Bantges, R., Russell, J. & Haigh, J. Cirrus cloud top - of - atmosphere radiance spectra in the thermal infrared.

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.

So while it must have a thermal spectrum characteristic of its temperature the intensity of that spectrum is down in the dirt so it contributes nothing by itself, per se, to the infrared glow of the atmosphere.