Archive for the ‘physics’ category: Page 21

Apr 12, 2023

NASA Confirms That Cosmic Object Is so Bright That It Defies Laws of Physics

Posted by in categories: physics, space

Astronomers have long debated the source of ULXs, chalking their brightness up to optical illusions. A new study confirms that they’re all that they appear.

Apr 12, 2023

Scientists create ‘slits in time’ in mind-bending physics experiment

Posted by in categories: physics, space

Researchers replicated the classic double slit experiment using lasers, but their slits are in time not space.

Apr 12, 2023

New discovery points the way to more compact fusion power plants

Posted by in categories: nuclear energy, physics

A magnetic cage keeps the more than 100 million degree Celsius hot plasmas in nuclear fusion devices at a distance from the vessel wall so that they do not melt. Now researchers at the Max Planck Institute for Plasma Physics (IPP) have found a way to significantly reduce this distance. This could make it possible to build smaller and cheaper fusion reactors for energy production. The work was published in the journal Physical Review Letters.

Apr 12, 2023

Groundbreaking New Dark Matter Map Validates Einstein’s Theory of General Relativity

Posted by in categories: cosmology, evolution, physics

Research by the Atacama Cosmology Telescope collaboration has culminated in a significant breakthrough in understanding the evolution of the universe.

For millennia, humans have been fascinated by the mysteries of the cosmos.

Unlike ancient philosophers imagining the universe’s origins, modern cosmologists use quantitative tools to gain insights into its evolution and structure. Modern cosmology dates back to the early 20th century, with the development of Albert Einstein’s theory of general relativity.

Apr 10, 2023

New Chip Expands the Possibilities for AI

Posted by in categories: biological, mathematics, physics, robotics/AI

Illuminating mathematics, physics, biology and computer science research through public service journalism.

Apr 10, 2023

Physicists observe ‘negative mass’

Posted by in category: physics

Physicists have created a fluid with “negative mass”, which accelerates towards you when pushed.

Apr 10, 2023

Researchers devise new membrane mirrors for large space-based telescopes

Posted by in categories: chemistry, physics, space

Researchers have developed a new way to produce and shape large, high-quality mirrors that are much thinner than the primary mirrors previously used for telescopes deployed in space. The resulting mirrors are flexible enough to be rolled up and stored compactly inside a launch vehicle.

“Launching and deploying space telescopes is a complicated and costly procedure,” said Sebastian Rabien from Max Planck Institute for Extraterrestrial Physics in Germany. “This new approach—which is very different from typical mirror production and polishing procedures—could help solve weight and packaging issues for telescope mirrors, enabling much larger, and thus more sensitive, telescopes to be placed in orbit.”

In the journal Applied Optics, Rabien reports successful fabrication of parabolic membrane mirror prototypes up to 30 cm in diameter. These mirrors, which could be scaled up to the sizes needed in space telescopes, were created by using chemical vapor deposition to grow membrane mirrors on a rotating liquid inside a vacuum chamber. He also developed a method that uses heat to adaptively correct imperfections that might occur after the mirror is unfolded.

Apr 9, 2023

Physicists Discover that Gravity Can Create Light

Posted by in categories: energy, physics

Researchers have discovered that in the exotic conditions of the early universe, waves of gravity may have shaken space-time so hard that they spontaneously created radiation.

The physical concept of resonance surrounds us in everyday life. When you’re sitting on a swing and want to go higher, you naturally start pumping your legs back and forth. You very quickly find the exact right rhythm to make the swing go higher. If you go off rhythm then the swing stops going higher. This particular kind of phenomenon is known in physics as a parametric resonance.

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Apr 8, 2023

Wormholes through space-time may actually exist

Posted by in categories: cosmology, physics

Once confined to the pages of science fiction, they are said to create shortcuts for long journeys across the universe.

Scientists have found they may magnify light by a factor of 100,000 — which is key to finding the strange tunnels.

Albert Einstein predicted their existence more than a century ago in his theory of general relativity.

Apr 6, 2023

Life: Modern physics can’t explain it—but our new theory, which says time is fundamental, might

Posted by in categories: alien life, physics

Over the short span of just 300 years, since the invention of modern physics, we have gained a deeper understanding of how our universe works on both small and large scales. Yet, physics is still very young and when it comes to using it to explain life, physicists struggle.

Even today, we can’t really explain what the difference is between a living lump of matter and a dead one. But my colleagues and I are creating a new of life that might soon provide answers.

More than 150 years ago, Darwin poignantly noted the dichotomy between what we understand in physics and what we observe in life—noting at the end of The Origin of Species “…whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.”

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