The validation and application of theories in physics require the measurement of universal values known as fundamental constants.
General Physics
Dec 02, 2020
2
2167
JILA researchers have used a state-of-the-art atomic clock to narrow the search for elusive dark matter, an example of how continual improvements in clocks have value beyond timekeeping.
General Physics
Nov 12, 2020
6
314
Optical clocks are so accurate that it would take an estimated 20 billion years—longer than the age of the universe—to lose or gain a second. Now, researchers in the U.S. led by Jun Ye's group at the National Institute ...
Not only does a universal constant seem annoyingly inconstant at the outer fringes of the cosmos, it occurs in only one direction, which is downright weird.
General Physics
Apr 27, 2020
28
16302
Scientists from Queen Mary University of London and the Russian Academy of Sciences have found a limit to how runny a liquid can be.
Condensed Matter
Apr 24, 2020
2
3790
A team of researchers affiliated with several institutions in China and one in Russia has devised two new ways to measure the gravitational constant. In their paper published in the journal Nature, the group describes the ...
EU-funded scientists have succeeded in redefining the ampere in terms of fundamental constants of physics. Based on the electron charge, the newly developed microscopic device has been reported as the most accurate technique ...
Quantum Physics
Jun 18, 2018
0
17
Paving the way for transforming the world's measurement system, an international task force has determined updated values for four fundamental constants of nature. The updated values comprise the last scientific piece of ...
General Physics
Oct 23, 2017
2
452
Using a state-of-the-art device for measuring mass, researchers at the National Institute of Standards and Technology (NIST) have made their most precise determination yet of Planck's constant, an important value in science ...
General Physics
Jun 30, 2017
28
894
At present, the kelvin is literally based on no more than water—on the triple point of water, to be more precise. The base unit of temperature is therefore dependent on a material whose properties may vary. But this is ...
General Physics
Apr 05, 2017
0
21
