Two of the forefathers of quantum theory, Albert Einstein and Niels Bohr, had a famous argument over whether light is a wave ...

Research findings are available online in the journal Science Advances. The original story “ Physicists use pulses of light ...

Scientists have unveiled a new approach to ultra-secure communication that could make quantum encryption simpler and more ...

Scientists experimentally confirmed what we’ve known to be true for half a century—darkness can “travel” faster than light.

The speed of light is one of the most fundamental constants in physics, yet it has never been directly measured in one direction. Instead, scientists rely on assumptions built into how time and ...

Light usually travels in straight lines, but what if it could twist, spiral, and ...

(Aitor Diago/Moment/Getty Images) For the first time, physicists have observed that 'holes' in light can move faster than the ...

In 1887, one of the most important experiments in the history of physics took place. American scientists Michelson and Morley failed to measure the speed of Earth by comparing the speed of light in ...

While the terms "quantum physics" and "Theory of Relativity" are used casually every day, not many people know what they really mean. Yet these theories have had a profound impact not only on science ...

The speed of light is treated like one of the most certain numbers in science, yet the deeper story is far more unsettling ...