Archive for the ‘physics’ category: Page 132

Dec 25, 2019

Viewpoint: A Forbidden Transition Allowed for Stars

Posted by in categories: cosmology, evolution, nuclear energy, physics

The discovery of an exceptionally strong “forbidden” beta-decay involving fluorine and neon could change our understanding of the fate of intermediate-mass stars.

Every year roughly 100 billion stars are born and just as many die. To understand the life cycle of a star, nuclear physicists and astrophysicists collaborate to unravel the physical processes that take place in the star’s interior. Their aim is to determine how the star responds to these processes and from that response predict the star’s final fate. Intermediate-mass stars, whose masses lie somewhere between 7 and 11 times that of our Sun, are thought to die via one of two very different routes: thermonuclear explosion or gravitational collapse. Which one happens depends on the conditions within the star when oxygen nuclei begin to fuse, triggering the star’s demise. Researchers have now, for the first time, measured a rare nuclear decay of fluorine to neon that is key to understanding the fate of these “in between” stars [1, 2]. Their calculations indicate that thermonuclear explosion and not gravitational collapse is the more likely expiration route.

The evolution and fate of a star strongly depend on its mass at birth. Low-mass stars—such as the Sun—transition first into red giants and then into white dwarfs made of carbon and oxygen as they shed their outer layers. Massive stars—those whose mass is at least 11 times greater than the Sun’s—also transition to red giants, but in the cores of these giants, nuclear fusion continues until the core has turned completely to iron. Once that happens, the star stops generating energy and starts collapsing under the force of gravity. The star’s core then compresses into a neutron star, while its outer layers are ejected in a supernova explosion. The evolution of intermediate-mass stars is less clear. Predictions indicate that they can explode both via the gravitational collapse mechanism of massive stars and by a thermonuclear process [36]. The key to finding out which happens lies in the properties of an isotope of neon and its ability to capture electrons.

Dec 25, 2019

Astrophysicists Developed a New Theory to Explain ‘Dark Energy’

Posted by in categories: cosmology, physics

The fact that our Universe is expanding was discovered almost a hundred years ago, but how exactly this happens, scientists realized only in the 90s of the last century, when powerful telescopes (including orbital ones) appeared and the era of exact cosmo.

International Journal of Modern Physics has published an article by the IKBFU Physics and Mathematics Institute Artyom Astashenok and the Institute’s MA student Alexander Teplyakov. The article refers to the issue of the “Dark Enegry” and an assumption is made that the Universe has borders.

Artyom Astashenok told:

Dec 24, 2019

Electronics at the speed of light

Posted by in categories: computing, mobile phones, physics

A European team of researchers including physicists from the University of Konstanz has found a way of transporting electrons at times below the femtosecond range by manipulating them with light. This could have major implications for the future of data processing and computing.

Contemporary electronic components, which are traditionally based on silicon semiconductor technology, can be switched on or off within picoseconds (i.e. 10-12 seconds). Standard mobile phones and computers work at maximum frequencies of several gigahertz (1 GHz = 109 Hz) while individual transistors can approach one terahertz (1 THz = 1012 Hz). Further increasing the speed at which electronic switching devices can be opened or closed using the standard technology has since proven a challenge. A recent series of experiments—conducted at the University of Konstanz and reported in a recent publication in Nature Physics—demonstrates that electrons can be induced to move at sub-femtosecond speeds, i.e. faster than 10-15 seconds, by manipulating them with tailored .

“This may well be the distant future of electronics,” says Alfred Leitenstorfer, Professor of Ultrafast Phenomena and Photonics at the University of Konstanz (Germany) and co-author of the study. “Our experiments with single-cycle light pulses have taken us well into the range of electron transport.” Light oscillates at frequencies at least a thousand times higher than those achieved by purely : One femtosecond corresponds to 10-15 seconds, which is the millionth part of a billionth of a second. Leitenstorfer and his team from the Department of Physics and the Center for Applied Photonics (CAP) at the University of Konstanz believe that the future of electronics lies in integrated plasmonic and optoelectronic devices that operate in the single-electron regime at optical—rather than microwave—frequencies. “However, this is very basic research we are talking about here and may take decades to implement,” he cautions.

Dec 24, 2019

Do Black Holes Create New Universes?

Posted by in categories: alien life, physics

||The formation of a black hole triggers the formation of a new Universe||

How the heck would it do that? A black hole is nothing but intense gravity. How could it create anything, least of all a brand new Universe? Also assumes that each Universe is governed by the same regularities so that black hole formation is possible. But if the regularities (“laws”) are the same, then the fundamental constants will be the same!

Continue reading “Do Black Holes Create New Universes?” »

Dec 24, 2019

Are you — is every person you’ve ever loved, every incredible sight you’ve ever witnessed — part of a hologram?

Posted by in categories: holograms, physics

Some scientists think so.

They argue that all the information in the universe may be stored on some sort of two-dimensional object. In this video, NASA astronomer Michelle Thaller delves into frontier science — an unchartered territory that may require a new level of physics to better understand.

Dec 22, 2019

The Alpha Point vs. the Omega Point: Ours is one of the possible worlds simulated in absolute consciousness

Posted by in categories: physics, space

The Universe is not what textbook physics tells us except that we perceive it in this way – our instruments and measurement devices are simply extensions of our senses, after all. Reality is not what it seems. Deep down it’s pure information – waves of potentiality – and consciousness creating it all.…sciousness #AlphaPoint vs. #OmegaPoint

“Each of us appears in the divine play in a dual role of creator and actor. A full and realistic enactment of our role in the cosmic drama requires the suspension of our true identity. We have to forget our authorship and follow the script.”

-Stanislav Grof

Continue reading “The Alpha Point vs. the Omega Point: Ours is one of the possible worlds simulated in absolute consciousness” »

Dec 21, 2019

The universe’s rate of expansion is in dispute – and we may need new physics to solve it

Posted by in categories: computing, cosmology, physics

Next time you eat a blueberry (or chocolate chip) muffin consider what happened to the blueberries in the batter as it was baked. The blueberries started off all squished together, but as the muffin expanded they started to move away from each other. If you could sit on one blueberry you would see all the others moving away from you, but the same would be true for any blueberry you chose. In this sense galaxies are a lot like blueberries.

Since the Big Bang, the universe has been expanding. The strange fact is that there is no single place from which the universe is expanding, but rather all galaxies are (on average) moving away from all the others. From our perspective in the Milky Way galaxy, it seems as though most galaxies are moving away from us – as if we are the centre of our muffin-like universe. But it would look exactly the same from any other galaxy – everything is moving away from everything else.

To make matters even more confusing, new observations suggest that the rate of this expansion in the universe may be different depending on how far away you look back in time. This new data, published in the Astrophysical Journal, indicates that it may time to revise our understanding of the cosmos.

Dec 21, 2019

Space-time metasurface makes light reflect only in one direction

Posted by in categories: physics, space travel

Light propagation is usually reciprocal, meaning that the trajectory of light travelling in one direction is identical to that of light travelling in the opposite direction. Breaking reciprocity can make light propagate only in one direction. Optical components that support such unidirectional flow of light, for example isolators and circulators, are indispensable building blocks in many modern laser and communication systems. They are currently almost exclusively based on the magneto-optic effect, making the devices bulky and difficult for integration. A magnetic-free route to achieve nonreciprocal light propagation in many optical applications is therefore in great demand.

Recently, scientists developed a new type of optical metasurface with which in both space and time is imposed on the , leading to different paths for the forward and backward light propagation. For the first time, nonreciprocal in was realized experimentally at optical frequencies with an ultrathin component.

“This is the first optical metasurface with controllable ultrafast time-varying properties that is capable of breaking optical reciprocity without a bulky magnet,” said Xingjie Ni, the Charles H. Fetter Assistant Professor in Department of Electrical Engineering at the Pennsylvania State University. The results were published this week in Light: Science and Applications.

Dec 18, 2019

Time is NOT real: Physicists show EVERYTHING happens at the same time

Posted by in categories: energy, physics

We are NOT our age we are our ENERGY

TIME is not real – it is a human construct to help us differentiate between now and our perception of the past, an equally astonishing and baffling theory states.

Dec 18, 2019

AMD releases FEMFX deformable physics library

Posted by in categories: materials, physics

AMD has published its new FEMFX deformable materials physics library and made it available for anyone to use in games and other software development.