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Archive for the ‘physics’ category: Page 188

Mar 4, 2021

Engineers Have Proposed The First Model For a Physically Possible Warp Drive

Posted by in categories: physics, space travel

The idea of a warp drive taking us across large areas of space faster than the speed of light has long fascinated scientists and sci-fi fans alike. While we’re still a very long way from jumping any universal speed limits, that doesn’t mean we’ll never ride the waves of warped space-time.

Now a group of physicists have put together the first proposal for a physical warp drive, based on a concept devised back in the ’90s. And they say it shouldn’t break any of laws of physics.

Theoretically speaking, warp drives bend and change the shape of space-time to exaggerate differences in time and distance that, under some circumstances, could see travelers move across distances faster than the speed of light.

Mar 4, 2021

For The First Time, Physicists Have Filmed The Oscillation of a Time Crystal

Posted by in category: physics

For the first time, physicists have captured an enigmatic state of matter on video.

Mar 3, 2021

Second Order Optical Merons, or Light Pretending to Be a Ferromagnet

Posted by in category: physics

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Scientists have demonstrated how to structure light such that its polarization behaves like a collective of spins in a ferromagnet forming half-skyrmions (also known as merons). To achieve this, the light was trapped in a thin liquid crystal layer between two nearly perfect mirrors. Skyrmions, in general, are found, e.g., as elementary excitations of magnetization in a two-dimensional ferromagnet but do not naturally appear in electromagnetic (light) fields.

One of the key concepts in physics, and science overall, is the notion of a “field” that can describe the spatial distribution of a physical quantity. For instance, a weather map shows the distributions of temperature and pressure (these are known as scalar fields), as well as the wind speed and direction (known as a vector field). Almost everyone wears a vector field on their head — every hair has an origin and an end, just like a vector. Over 100 years ago L.E.J. Brouwer proved the hairy ball theorem which states that you can’t comb a hairy ball flat without creating whorls, whirls (vortices), or cowlicks.

Continue reading “Second Order Optical Merons, or Light Pretending to Be a Ferromagnet” »

Mar 3, 2021

A warp drive that doesn’t break the laws of physics is possible

Posted by in categories: physics, space travel

Previous ideas about how to make these hypothetical devices have required exotic forms of matter and energy that may not exist, but a new idea for a warp drive that doesn’t break the laws of physics may be theoretically possible. However, it may not be practical in the foreseeable future because it requires ultra dense materials.

Mar 2, 2021

Warp Drives Are No Longer Science Fiction

Posted by in categories: business, physics, space travel

NEW YORK—()—Scientists at Applied Physics are excited to announce they have recently constructed the first model of physical warp drives.

“While we still can’t break the speed of light, we don’t need to in order to become an interstellar species” Tweet this

Applied Physics is an independent group of scientists, engineers, and inventors that advise companies and governments on science and technology for both commercial and humanitarian applications.

Mar 2, 2021

How English became the language of physics

Posted by in category: physics

Today, more than 90% of the indexed articles in the natural sciences are published in English. That wasn’t always the case.

Mar 1, 2021

Bottling the World’s Coldest Plasma to Unlock the Secrets of Fusion Power

Posted by in categories: energy, physics, space

Laser-cooled plasma-in-a-bottle could answer questions about the sun, fusion power. Rice University physicists have discovered a way to trap the world’s coldest plasma in a magnetic bottle, a technological achievement that could advance research into clean energy, space weather and astrophysics.

Mar 1, 2021

Neil deGrasse Tyson’s Life Advice Will Leave You SPEECHLESS — One of the Most Eye Opening Interviews

Posted by in category: physics

Neil deGrasse Tyson, American astrophysicist, cosmologist, planetary scientist, author, and science communicator, gives one of the most eye opening interviews you will ever hear.
►Inspired? Get Neil’s book, Astrophysics for People in a Hurry: https://amzn.to/2Mm3YSc.

Thank you to Tom Bilyeu for providing the amazing interview! Check out his awesome channel here for more: https://www.youtube.com/TomBilyeu.

Continue reading “Neil deGrasse Tyson’s Life Advice Will Leave You SPEECHLESS — One of the Most Eye Opening Interviews” »

Mar 1, 2021

Neil deGrasse Tyson — Mind-Blowing Facts About The Universe- Top Speech

Posted by in categories: alien life, physics

Neil degrasse tyson, science, neil tyson, neil degrasse tyson (organization leader), tyson, neil, astrophysics, degrasse, cosmos, space, universe, earth, startalk, ndt, aliens, mars, comedian, atheist, chuck nice, hayden planetarium, god, physics, astrophysicist, asteroid, comedy, atheism, interview, star talk, mkbhd, stars, time.

Mar 1, 2021

Surprise in Solid-State Physics: Magnetic Effect Without a Magnet

Posted by in categories: materials, physics

Surprise in solid-state physics: The Hall effect, which normally requires magnetic fields, can also be generated in a completely different way – with extreme strength.

Electric current is deflected by a magnetic field – in conducting materials this leads to the so-called Hall effect. This effect is often used to measure magnetic fields. A surprising discovery has now been made at TU Wien, in collaboration with scientists from the Paul Scherrer Institute (Switzerland), McMater University (Canada), and Rice University (USA): an exotic metal made of cerium, bismuth, and palladium was examined and a giant Hall effect was found to be produced by the material, in the total absence of any magnetic field. The reason for this unexpected result lies in the unusual properties of the electrons: They behave as if magnetic monopoles were present in the material. These discoveries have now been published in the scientific magazine PNAS.

A voltage perpendicular to the current.