The gravitational constant G determines the strength of gravity—the force that makes apples fall to the ground or pulls the Earth in its orbit around the sun. It is part of Isaac Newton's law of universal gravitation, which ...
General Physics
Jul 11, 2022
10
1009
Nanographene is a material that could radically improve solar cells, fuel cells, LEDs and more. Typically, the synthesis of this material has been imprecise and difficult to control. For the first time, researchers have discovered ...
Nanomaterials
Nov 11, 2020
1
1243
Optical tweezers use light to immobilize microscopic particles as small as a single atom in 3D space. The basic principle behind optical tweezers is the momentum transfer between light and the object being held. Analogous ...
Optics & Photonics
Jan 26, 2022
0
604
On Feb. 10, 2009, disaster struck hundreds of miles above the Siberian Peninsula. That evening, a defunct Russian satellite orbiting Earth crashed into a communications satellite called Iridium 33 moving at a speed of thousands ...
Space Exploration
Jun 1, 2023
1
171
The Standard Model of particle physics describes all the known elementary particles and three of the four fundamental forces governing the universe; everything except gravity. These three forces—electromagnetic, strong, ...
General Physics
Sep 25, 2020
5
1268
Researchers from the University of Maine and Penn State discovered that molecules experience non-reciprocal interactions without external forces.
Condensed Matter
Dec 29, 2023
0
1006
Alaskans and visitors may be able to see an artificial airglow in the sky created by the High-frequency Active Auroral Research Program during a four-day research campaign that starts Saturday.
Planetary Sciences
Nov 3, 2023
0
355
Could washing our clothes with detergent become a thing of the past? Even though the research is in its early stages, an investigation as to whether washing or cleaning can be done with purified water instead of detergent ...
Materials Science
Jan 6, 2023
5
159
As a physicist working at the Large Hadron Collider (LHC) at Cern, one of the most frequent questions I am asked is "When are you going to find something?" Resisting the temptation to sarcastically reply "Aside from the Higgs ...
Plasma Physics
May 9, 2022
29
1993
A special bonding state between atoms has been created in the laboratory for the first time: With a laser beam, atoms can be polarized so that they are positively charged on one side and negatively charged on the other. This ...
Optics & Photonics
Aug 1, 2022
0
696
