Fifty years ago, Harold Edgerton took a photo of a bullet passing through an apple using super high speed photography.
Since then, femto photography has been developed that allows for cameras to record at 1 billion frames per second allowing packets photons to be seen travelling. This opens up some new and exciting possibilities.
http://www.techi.com/wp-content/uploads/2012/08/Harold-Edgerton-Bullet-Image.jpg
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