(Phys.org)—The speed of light, c, is one of the best-known constants, having a value of just under 300,000,000 meters per second in a vacuum. But in some alternative theories of cosmology, the speed of light is not actually ...
Researchers have discovered that tantalum carbide and hafnium carbide materials can withstand scorching temperatures of nearly 4000 degrees Celsius.
Materials Science
Dec 22, 2016
9
111
Physicists have long struggled to explain why the universe started out with conditions suitable for life to evolve. Why do the physical laws and constants take the very specific values that allow stars, planets and ultimately ...
General Physics
Nov 22, 2022
79
144
In the center of most galaxies lies a supermassive black hole. Some of these are actively feeding on the gas and dust around them, expelling excess energy as powerful jets that are seen as quasars across the entire observable ...
Astronomy
Feb 1, 2022
0
1181
A new study suggests that climate change could soon eliminate an atmospheric barrier that protects much of the U.S. East Coast from powerful hurricanes.
Earth Sciences
May 24, 2019
4
1114
Scientists have discovered a new ring system around a dwarf planet on the edge of the solar system. The ring system orbits much further out than is typical for other ring systems, calling into question current theories of ...
Astronomy
Feb 8, 2023
1
489
Nature's speed limits aren't posted on road signs, but Rice University physicists have discovered a new way to deduce them that is better—infinitely better, in some cases—than previous methods.
Quantum Physics
Sep 4, 2020
2
1742
A team of physicists at the Technical University of Denmark has found the reason a spinning magnet can cause a secondary magnet to levitate without the need for stabilization. In their paper published in the journal Physical ...
Quantum mechanics has fundamental speed limits—upper bounds on the rate at which quantum systems can evolve. However, two groups working independently have published papers showing for the first time that quantum speed ...
Researchers have demonstrated that a laser can transmit an audible message to a person without any type of receiver equipment. The ability to send highly targeted audio signals over the air could be used to communicate across ...
Optics & Photonics
Jan 23, 2019
10
1378
