Then, in addition, atomic units usually leave unspecified whether or not a reduced mass is given unit value instead of the electron mass, or indeed whether other modifications have been made ...

It's one thing to use an atomic explosion as a unit for describing a meteor's explosion -- the two are similar in that much of their energy is released as a blast wave ...

A research team in DGIST has newly developed imaging system that can analyze the movement of sound generated from 2-D structure with the thickness of an atomic unit. It is expected to be used in ...

Of all the units humanity uses for measurement, the most precisely defined is the second, a fundamental unit of time. ... Highly precise atomic clocks could soon get even better. Here's how : ...

Because those optical atomic clocks operate at a higher frequency, their “ticks” are more closely spaced, making them about 100 times more precise than cesium clocks.