In physics, the treatment of time is a central issue. In physics, the treatment of time is a central issue. It has been treated as a question of geometry. One can measure time and treat it as a ...

Scientists have measured the shortest unit of time ever, the time it takes for a particle of light to cross a hydrogen molecule.

The time it takes for an atom to quantum-mechanically tunnel through an energy barrier has been measured by Aephraim Steinberg of the University of Toronto and colleagues. The team observed ultracold ...

A group of physicists has measured gravity using the effects of time dilation — the slowing of time imparted by increased velocity or gravitational force — on atoms.

Accurate measurement of time is one of the glories of physics, and one of the most exciting frontiers of current research. For most of history, people measured time using the sun and moon.

An atomic clock measured how general relativity warps time across a millimeter The record-breaking result reveals the incredible precision achievable by atomic clocks ...

They discovered that the birth time of the electron that flies away is technically unknown. It simultaneously exists in a quantum state where it departs at both an earlier and later time-on ...

In physics, they are all the same thing. But to you, me, and everyone else, time moves in one direction: from expectation, through experience, and into memory. This linearity is called the arrow ...