The MIT media lab researchers have created a camera which captures at a shutter speed of one trillion frames per second, meaning it can actually record the travelling of photons of light between points.

The team hit the breakthrough taking a picture of a laser beam as it passed through a fizzy drink bottle, using a sophisticated system with a modified Streak Tube to intensify the photons and a pretty beasty-sized camera.  The footage that was captured required multiple hundreds of takes of the same experiment, creating quite a beautiful stop motion film of multiple beams of light reflecting through the bottle, collecting in the cap and dispersing.