I remember my 6th or 7th grade science teacher being able to place the laser on the wall and generate sound. We would hit the wall and the compression on the light wave caused audio from a speaker. Does anyone know how to do this?
I can imagine it being done with a Laser, but likewise without a laser. For the laser to work it would have to have a light sensor that it was shining on that was not on the wall that could then 'measure' and amplify electronically these variations in the light from the vibrations in the wall.
Where I went to school, the walls were made out of those large bricks with 2 large rectangular hollows in each end of them. Just how strong was you teacher? LoL (< 8)
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My question is: was the teacher using a light sensor with other electronics to amplify the sound? If not, did the wall make the same sounds when struck in a similar manner when there was no laser on it? If so, the laser per say was irrelevant and a ruse. If the laser was mounted such that the beam was traveling parallel to the wall that it was mounted on, it would give a visual indication of the vibrations when the beam hit a wall, floor or ceiling perpendicular to the wall.
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Laser and sound
Re: Laser and sound
