When a sample absorbs infrared radiation A - VCE - SSCE Chemistry - Question 8 - 2010 - Paper 1

When a sample absorbs infrared radiation, it primarily influences the vibrational motion of covalent bonds within molecular structures. This absorption occurs at specific wavelengths that correspond to the vibrational frequencies of the bonds. As the sample absorbs infrared radiation, the bonds within the molecules will stretch, bend, or undergo various vibrational movements, a phenomenon which is crucial for the molecular dynamics and interactions. This is why option B is the correct answer.