Photoacoustic spectroscopy Photoacoustic spectroscopy Photoacoustic spectroscopy is the measurement of the effect of absorbed electromagnetic energy (particularly of light) on matter by means of acoustic detection. The discovery of the photoacoustic effect dates to 1880 when Alexander Graham Bell showed that thin discs emitted sound when exposed to a beam of sunlight that was rapidly interrupted with a rotating slotted disk. The absorbed energy from the light causes local heating, generating a thermal expansion which creates a pressure wave or sound. Later Bell showed that materials exposed to the non-visible portions of the solar spectrum (i.e., the infrared and the ultraviolet) can
Ultraviolet (Light My Way) school when it came out and we'd drive around in my friend's mom's car and rock that shit all the time. When we were asked to record a cover, 'Ultraviolet' was a unanimous choice. It's reassuring to know that we're still on the same page after all these years. We brought it back to its bare bones, dumbed it down a little, took it back to the rock song underneath." The beginning of the song was also sampled by Enigma in their 1994 song "The Eyes of Truth". Footnotes Bibliography Ultraviolet (Light My Way) "Ultraviolet (Light My Way)" is a