Slow Mo Guys Film Speed of Light 10-Trillion FPS Caltech
Gavin Free and Dan Gruchy of the Slow Mo Guys headed to Caltech and used their ultra high-speed camera to film the speed of light at 10-trillion frames per second. Postdoctoral scholar Peng Wang met up with them at the school’s Compressed Ultrafast Photography department to attempt the feat.



Since this specialized camera is only capable of detecting light itself, the bottle you see had to be superimposed in post production. This camera technology, called compressed ultrafast spectral photography (CUSP), combines a laser that emits extremely short pulses of laser light that last only one quadrillionth of a second (one femtosecond) with optics as well as a specialized type of camera. If you dive deeper, the optics actually break up individual femtosecond pulses of laser light into a train of even shorter pulses, with each of them capable of producing an image in the camera.

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Slow Mo Guys Film Speed of Light 10-Trillion FPS Caltech

We envision applications in a rich variety of extremely fast phenomena, such as ultrashort light propagation, wave propagation, nuclear fusion, photon transport in clouds and biological tissues, and fluorescent decay of biomolecules, among other things,” said Lihong Wang, Bren Professor of Medical Engineering at Caltech.

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