Speed of Light Lingers in Face of New Camera

Others  | 12 December 2011  | print

M.I.T.’s camera captures light particles seemingly in motion by using repeated exposures, creating a “movie” of a nanosecond-long event. | Di Wu and Andreas Velten, MIT Media Lab

By John Markoff

More than 70 years ago, the M.I.T. electrical engineer Harold (Doc) Edgerton began using strobe lights to create remarkable photographs: a bullet stopped in flight as it pierced an apple, the coronet created by the splash of a drop of milk.

Now scientists at M.I.T.’s Media Lab are using an ultrafast imaging system to capture light itself as it passes through liquids and objects, in effect snapping a picture in less than two-trillionths of a second.

The project began as a whimsical effort to literally see around corners — by capturing reflected light and then computing the paths of the returning light, thereby building images coming from rooms that would otherwise not be directly visible.

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