Sentences with phrase «about black body radiation»

I don't understand how the Planck function, which is about black body radiation, affects a greenhouse gas.

Not exact matches

First off, an idealised «black body» (which gives of radiation in a very uniform and predictable way as a function of temperature — encapsulated in the Stefan - Boltzmann equation) has a basic sensitivity (at Earth's radiating temperature) of about 0.27 °C / (W / m2).

Now some energy has already escaped to space by radiation directly from the surface, and Trenberth insists that is only 40 Watts per square meter, or about 10 % of the roughly 390 W / m ^ 2 corresponding to a 288 Kelvin black body spectrum.

That's why I did no assumption about the precise properties of the radiation (isotropic, continuous, black body etc).

It corresponds to a Black body radiation Temperature of about +15 deg.

This assumption is absurd, the Earth reflects about 30 % of the Sun's radiation, that is why we can see it at all; the Earth can not reflect 30 % and radiate as a black body at the same time.

We'd need to add the Bond albedo into Equation 2.3 (making this a gray body instead of a black body in the process) and so about 10 % of the radiation that reaches Venus is actually absorbed by the planet.

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.

Claim 6: The energy content of the radiation from the Atmosphere to Space approximates the energy radiated by a black body at about 255 K -LRB--18 ºC or -1 ºF).

2) The dipole of water means that unlike linear CO2 and tetrahedral CH4, water has a strong pure rotational absorption spectrum, and this rotational absorption, sitting on top of most of the 277K black body radiation from a «naked» earth, is what is responsible for the natural warming of about 20K.

He accurately reported that about 10 % of the radiation from a 100 °C black body was absorbed in his tube, and that at lower pressure at most 9.6 % was absorbed, whereas in fact it must have been about 9 %.

In practice the radiation into space is pretty much the black body spectrum you would expect for a body at about 290K with reductions at particular wavelengths particularly between 5 and 8 micron and between 14 and 18 micron as you describe in your text.