= Photoacoustic spectroscopy
{wiki=Photoacoustic_spectroscopy}
Photoacoustic spectroscopy (PAS) is an analytical technique that combines aspects of both optical spectroscopy and acoustic detection. It is based on the photoacoustic effect, which occurs when a material absorbs light (usually laser light) and then undergoes a rapid thermal expansion, resulting in the generation of acoustic waves (sound). \#\#\# Key Principles of Photoacoustic Spectroscopy: 1. **Light Absorption:** - The sample is illuminated with modulated light at specific wavelengths.
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