Source: wikibot/photoacoustic-effect
= Photoacoustic effect
{wiki=Photoacoustic_effect}
The photoacoustic effect is a phenomenon in which materials absorb light and subsequently emit acoustic waves (sound waves) as a result of thermal expansion. This process occurs when a material absorbs photons from a light source (usually a laser), leading to a localized temperature increase. The rapid thermal expansion due to the absorbed energy creates mechanical stress in the material, which produces sound waves.