In an IR spectra the X axis is wavenumber of the IR radiation which is another way to describe the
_(_())_(_()) of the
(7) radiation. There is a direct correlation between wavenumber and energy, thus the higher the wave number the
_(_())_(_()) the energy.
The Y axis is
_(_())_(_()) which is a measure of the ilght that makes it through the sample to the detector.
Infrared light that makes it through the sample and to the detector is
_(_())_(_()) by a functional group in the molecule. This is then converted to
_(_())_(_()) which corresponds to 3 particular wavelength or frequency in the IR spectra.