Photoacoustic effect a rotating slotted wheel. He noticed that the resulting acoustic signal was dependent on the type of the material and correctly reasoned that the effect was caused by the absorbed light energy, which subsequently heats the sample. Later Bell showed that materials exposed to the non-visible (ultra-violet and infra-red) portions of the solar spectrum can also produce sounds and invented a device, which he called "spectrophone", to apply this effect for spectral identification of materials. Bell himself and later John Tyndall and Wilhelm Röntgen extended these experiments, demonstrating the same effect in liquids and gases. However, the results were too
Invisible Light song itself was cut down from its 6-minute album length into a radio edit of 4 minutes in length, and features the vocals of Sir McKellen spoken through an actor portraying a hypnotist. The bands' members describe the video as "a magical trip down the rabbit hole". The video is inspired by the nightmares of Mia Farrow in "Rosemary's Baby" and Catherine Deneuve in "Belle de jour". Liz Taylor's version of Cleopatra also appears as a character of the video. Invisible Light "Invisible Light" is a song by American band Scissor Sisters, serving as the third and final single from