A double feather-blanket




This nice picture shows the absorbtion spectra ot the "heat rays" - infrared light. Wide absorbing bands originate from water vapour – for example from the rain or from your breath.

As you can see water vapour absorbs heat. And - clouds did not allow the heat to escape from Earth – really cold nights that those without clouds. Have you noticed it?

A narrow band in the middle, which you can see in better in the insert, is that due to carbon dioxide - it also does not allow the heat to escape from Earth's surface.

If there is too many carbon dioxide in the air – it is like to cover yourself with a double feather-blanket – it will be too hot !


Lo spettro IR ottenuto con spettrometro JASCO 660V, in aria. Cortesia prof. Gino Mariotto.