In an IR spectra the X axis is wavenumber of the IR radiation which is another way to describe the _____________ of the 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 light that makes it through the sample to the detector. Light that does not make it through the sample to the detector is _____________ by a functional group in the molecule and converted to___________