The speed of light is often regarded as the ultimate cosmic speed limit, but researchers have now managed to slow it down ...

Since optical analog computing devices are passive—that is, they do not need electrical power—almost no energy is consumed, and moreover, the operation is literally done at the speed of light.

Majumdar and Heide's research prototype uses optics for computing, significantly reducing power consumption and enabling the camera to identify objects at the speed of light. Their device also ...