Are you interested in seeing how light propagates? Filming light reflecting off objects article tells about a method for capturing “light in flight”. Making videos of light passing through and around objects has been done before, but this system is much cheaper (few hundred dollars) than those earlier systems ($300,000).
Light-in-Flight Imaging page on that system tells that transient imaging is a recent imaging modality in which short pulses of light are observed “in flight” as they propagate through a scene. Transient images are useful to help understand light propagation in complex environments and to analyze light transport.
This system uses modulated light from a managed source, an uses somewhat similar tricks as used on Time-of-flight camera systems. Check the video on those pages to get idea that can be done with this kind of imaging.
The innovation around New camera technologies does not seem to stop.