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← ScienceWhich distortion affects an infrared spectroscopy absorption signal generated by a gas sample at high concentration?
A)Band broadening from collisional broadening✓
B)Wavenumber shift from doppler effect
C)Intensity increase from stimulated emission
D)Peak splitting from analyte dimerization
💡 Explanation
When a gas sample's concentration increases, molecules collide more frequently, causing collisional broadening that distorts the spectral bands. Therefore, band broadening occurs, rather than wavenumber shift, intensity increase, or peak splitting, which depend on pressure gradients or specific molecular interactions.
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