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Category: physics – Page 166

Experiment demonstrates continuously operating optical fiber made of thin air

Great, until the mention of “directed energy”…

Researchers at the University of Maryland (UMD) have demonstrated a continuously operating optical fiber made of thin air.

The most common optical fibers are strands of glass that tightly confine light over long distances. However, these fibers are not well-suited for guiding extremely high-power beams due to glass damage and scattering of laser energy out of the fiber. Additionally, the need for a physical support structure means that glass fiber must be laid down long in advance of light signal transmission or collection.

Howard Milchberg and his group in UMD’s Departments of Physics and Electrical & Computer Engineering and Institute for Research in Electronics & Applied Physics have demonstrated an optical guiding method that beats both limitations, using auxiliary ultrashort laser pulses to sculpt fiber optic waveguides in the air itself.

From Theory to Reality: A Groundbreaking Manifestation of Interdependent Networks in a Physics Lab

New findings enable experimental studies to control and further develop the multiscale phenomena of complex interdependent materials.

Bar-Ilan University researchers Havlin and Frydman have demonstrated the “network of networks” theory using a controlled system of interdependent superconducting networks. The study confirms that coupled networks exhibit abrupt transitions under varying temperatures, validating Havlin’s 2010 theory. This groundbreaking research has significant implications across physics, materials science, and device applications, potentially leading to new developments in self-healing systems, sensitive sensors, and network metamaterials.

Metamaterials are engineered materials that have properties not usually found in nature.

6 Physics Breakthroughs Predicted During Your Lifetime | Unveiled

The future of physics is very bright indeed! Join us, and find out more!

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In this video, Unveiled takes a closer look at the most exciting ways that physics will change the world during YOUR lifetime! We’re now SO CLOSE to making these incredible breakthroughs, but which will happen first? And which will have the greatest impact on life, the universe, and everything?

This is Unveiled, giving you incredible answers to extraordinary questions!

Find more amazing videos for your curiosity here:
6 Scientific Breakthroughs Predicted For Your Lifetime — https://youtu.be/wGKj-3AfxdE
6 NASA Breakthroughs Predicted For Your Lifetime — https://youtu.be/EMiUmz33uJo.

0:00 Intro.

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Godel & Einstein | Einstein walked with Gödel | Kurt Gödel | Incompleteness theorem | Logic

This video is about the story of two geniuses, Albert Einstein and the famous logician Kurt Godel. It is about their meeting at IAS, Princeton, New Jersey, when they both walked and discussed many things. For Godel, Einstein was his best friend and till his last days, he remain close to Einstein. Their nature was opposite to each other, yet both of them were very good friends. What did they talk about with each other? What did they share? What were their thoughts? For Godel, Einstein was more like his guide and for Einstein, it was a great pleasure to walk with him.

In the first episode, we discover their first meeting with each other and the development of friendship between them.

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Physicists Discover a Strange New Theoretical Phase of Hydrogen

This new solid hydrogen phase discovered by an international team of researchers followed the model’s presentation of hydrogen molecules under extreme conditions: to use a food analogy, their shape morphed from spheres stacked like a pile of oranges to something that more closely resembled eggs.

Hydrogen typically requires very low temperatures and very high pressures to form a solid. It was through a novel machine learning study of this particular phase change that the scientists came across the new molecular arrangement.

Time Travel and it’s Possibility

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Time travel has long been a popular theme in movies, but scientists believe that the concept of time teleportation is unlikely in reality. However, they do not dismiss the possibility of time travel altogether. The laws of physics suggest that time travel may be possible, but the details are complex.

Physicists explain that traveling to the near future is relatively simple, as we are all doing it right now at a rate of one second per second. Additionally, Einstein’s special theory of relativity states that the speed at which we move affects the flow of time. In other words, the faster we travel, the slower time passes. Furthermore, Einstein’s general theory of relativity suggests that gravity also impacts the flow of time. The stronger the nearby gravity, the slower time goes.

We’re still in the dark about a key black hole paradox

Within a year, Karl Schwarzschild, who was “a lieutenant in the German army, by conscription, but a theoretical astronomer by profession,” as Mann puts it, heard of Einstein’s theory. He was the first person to work out a solution to Einstein’s equations, which showed that a singularity could form–and nothing, once it got too close, could move fast enough to escape a singularity’s pull.

Then, in 1939, physicists Rober Oppenheimer (of Manhattan Project fame, or infamy) and Hartland Snyder tried to find out whether a star could create Schwarzschild’s impossible-sounding object. They reasoned that given a big enough sphere of dust, gravity would cause the mass to collapse and form a singularity, which they showed with their calculations. But once World War II broke out, progress in this field stalled until the late 1950s, when people started trying to test Einstein’s theories again.

Physicist John Wheeler, thinking about the implications of a black hole, asked one of his grad students, Jacob Bekenstein, a question that stumped scientists in the late 1950s. As Mann paraphrased it: “What happens if you pour hot tea into a black hole?”

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