CO2
H2O
Because of their
varying geometries and sizes,
different molecules absorb radiation of
different wavelengths. For example, CO2 tends to absorb
radiation of a wavelength of 15
microns (this wavelength excites
bending vibration of the CO2 molecule), whereas H2O tends to
absorb at wavelengths around
12 microns (rotation of the H2O molecule) .
CH4