Infrared spectroscopy

Question 1

Whats happens inside a spectrometer

Answer 1

Beam of infrared containing a spread of frequency is passed through sample
Radiation that emerges is missing the frequencies that correspond to bonds found in sample
Plots a graph of radiation intensity
Frequency expressed as a wavenumber in cm^-1

Question 2

How does frequency affect the bonds in a molecule

Answer 2

Stronger bonds vibrate faster at high frequency
Heavier atoms make bond vibrate slowly at low frequency