Blazars are galaxies whose central, supermassive black holes are accreting material from surrounding regions. Although black hole accretion happens in many galaxies and situations, in the case of a blazar the infalling material ...
Astronomy
Jun 6, 2016
1
57
Current textbooks often refer to the Lorentz-Maxwell force governed by the electric charge. But they rarely refer to the extension of that theory required to explain the magnetic force on a point particle. For elementary ...
General Physics
Jan 29, 2018
10
47
Sunspots have been observed for about four centuries, since they were first reported by Galileo. Appearing in roughly eleven-year cycles of activity, sunspots are regions of strong and complex magnetic fields which are also ...
Space Exploration
Apr 5, 2011
6
0
After the sun ejected a violent mass of fast-moving plasma into space on 9 October, ESA waited for the storm to strike. A few days later, the coronal mass ejection (CME) arrived at Earth, crashing into our planet's magnetosphere, ...
Planetary Sciences
Oct 19, 2021
0
85
Using an atomic-force microscope fitted with an electrode tip 1,000 times smaller than a human hair, University of Oregon researchers have identified in real time how nanoscale catalysts collect charges that are excited by ...
Materials Science
Oct 7, 2019
0
225
(PhysOrg.com) -- Scientists at the U.S. Department of Energy’s Argonne National Laboratory have pushed the limits of charge breeding and broken a long-standing world record for ionization efficiency of solids.
General Physics
Apr 13, 2010
0
0
Is your cable television on the fritz? One explanation, scientists suspect, may be the weather—the weather in space, that is. MIT researchers are investigating the effects of space weather—such as solar flares, geomagnetic ...
Space Exploration
Sep 16, 2013
6
0
Researchers from the Institute of Laser Engineering at Osaka University have successfully used short, but extremely powerful laser blasts to generate magnetic field reconnection inside a plasma. This work may lead to a more ...
General Physics
Sep 7, 2020
0
114
There has been great interest in recent years in using tiny particles called quantum dots to produce low-cost, easily manufactured, stable photovoltaic cells. But, so far, the creation of such cells has been limited by the ...
Nanophysics
May 24, 2013
2
0
Imagine how much you could accomplish if the circuits in your laptop and cell phone worked 10 times faster, and your battery lasted 10 times longer, than they do now.
General Physics
Jan 18, 2019
0
14
