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