One of the greatest problems in modern physics is to reconcile the enormous difference between the energy carried by random fluctuations in the vacuum of space, and the dark energy driving the universe's expansion.
General Physics
20 hours ago
3
174
A team of researchers led by the University of Massachusetts Amherst has recently found an exception to the 200-year-old law, known as Fourier's Law, that governs how heat diffuses through solid materials.
General Physics
Mar 4, 2024
0
129
Correcting 50-year-old errors in the math used to understand how electromagnetic waves scatter electrons trapped in Earth's magnetic fields will lead to better protection for technology in space.
Space Exploration
Mar 4, 2024
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282
Scientists from Australia and the United States have found a new way to alter the DNA of bacterial cells—a process used to make many vital medicines including insulin—much more efficiently than standard industry techniques.
Bio & Medicine
Feb 29, 2024
2
48
A research team from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and the University of Salerno in Italy has discovered that thin films of elemental bismuth exhibit the so-called non-linear Hall effect, which could be ...
Condensed Matter
Feb 28, 2024
0
53
Dark matter comprises more than 80% of all matter in the cosmos but is invisible to conventional observation, because it seemingly does not interact with light or electromagnetic fields. Now Dr. Sukanya Chakrabarti, the Pei-Ling ...
Astronomy
Feb 26, 2024
0
162
Research by Dr. Ruiwen Shao and Prof. Junwei Wu (Institute of Electromagnetic Space, Southeast University, Nanjing, China) teaches us about how digital metasurfaces lose information.
Optics & Photonics
Feb 21, 2024
0
1
The recent release of the wastewater from Japan's Fukushima nuclear disaster stirred apprehension regarding the health implications of radiation exposure. Classified as a Group 1 carcinogen, ionizing radiation has long been ...
Cell & Microbiology
Feb 14, 2024
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1
A new approach has allowed researchers at Aalto University to design a kind of metamaterial that has so far been beyond the reach of existing technologies. Unlike natural materials, metamaterials and metasurfaces can be tailored ...
Condensed Matter
Feb 14, 2024
0
152
One of the most important components of satellites that enable telecommunication is the waveguide, which is a metal tube for guiding radio waves. It is also one of the heaviest payloads satellites carry into orbit. As with ...
Nanomaterials
Feb 7, 2024
0
136
Electromagnetic radiation (sometimes abbreviated EMR) is a ubiquitous phenomenon that takes the form of self-propagating waves in a vacuum or in matter. It consists of electric and magnetic field components which oscillate in phase perpendicular to each other and perpendicular to the direction of energy propagation. Electromagnetic radiation is classified into several types according to the frequency of its wave; these types include (in order of increasing frequency and decreasing wavelength): radio waves, microwaves, terahertz radiation, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays. A small and somewhat variable window of frequencies is sensed by the eyes of various organisms; this is what we call the visible spectrum, or light.
EM radiation carries energy and momentum that may be imparted to matter with which it interacts.
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