Archive for the ‘physics’ category: Page 196

Dec 4, 2018

Discovery of single material that produces white light could boost efficiency of LED bulbs

Posted by in categories: energy, physics

Physicists at The University of Toledo are part of an international team of scientists who discovered a single material that produces white light, opening the door for a new frontier in lighting, which accounts for one-fifth of global energy consumption.

“Due to its high efficiency, this new material can potentially replace the current phosphors used in LED lights — eliminating the blue-tinged hue — and save energy,” said Dr. Yanfa Yan, professor of physics at UT. “More research needs to be done before it can be applied to consumer products, but the ability to reduce the power that bulbs consume and improve the color quality of light that the bulbs emit is a positive step to making the future more environmentally friendly.”

The renewable energy research was recently published in Nature, the world’s leading multidisciplinary science journal.

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Dec 4, 2018

Physicists Have Announced The Discovery Of Four Black Hole Mergers After Observation Of Gravitational Waves

Posted by in categories: cosmology, physics

Physicists creating the Gravitational Wave Transient Catalog have discovered four new black hole mergers through the detection of gravitational waves.

Over the weekend in Maryland, physicists involved in the Virgo and LIGO project made the exciting announcement that they had discovered four completely new black hole mergers which came about after gravitational waves were detected around these black holes. This includes what is thought to be the largest black hole collision that we currently know about, which occurred a whopping 5 billion years ago. This monstrous collision created a black hole so big that it is 80 times larger than the sun.

As Ars Technica reports, the four new black hole mergers that have been discovered will be included in a very special piece of research known as the Gravitational Wave Transient Catalog, or GWTC-1, whose aim will be to report on gravitational wave events like these and document them thoroughly. Including the four new black hole mergers that were just detected, there will now be 11 gravitational wave events to catalog.

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Dec 3, 2018

Scientists Just Made a Major Discovery

Posted by in categories: cosmology, physics

This discovery could help us answer some of the largest conundrums in physics today. Scientists know that matter and antimatter were created in about equal proportions after the Big Bang, as the universe cooled and expanded, but they can’t explain the asymmetry of matter and antimatter, or why antimatter, which annihilates anything it comes into contact with, didn’t just wipe out all matter.

“[W]e have yet to answer a central question of why didn’t matter and antimatter, which it is believed were created in equal amounts when the Big Bang started the Universe, mutually self-annihilate?” co-author Professor Mike Charlton said to Sci-News. “We also have yet to address why there is any matter left in the Universe at all. This conundrum is one of the central open questions in fundamental science, and one way to search for the answer is to bring the power of precision atomic physics to bear upon antimatter.”

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Dec 3, 2018

Monster black hole merger detected

Posted by in categories: cosmology, physics

Laser labs sense gravitational waves from a black hole collision at least five billion light-years away.

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Dec 1, 2018

The Incandescent Drafts Of Brilliant Physicist Richard Feynman Have Sold At Auction For $4,922,625

Posted by in category: physics

Along with Richard Feynman’s varied scribblings and thoughts, his Nobel Prize, tambourine and book collection were also available at Sotheby’s.

One of the undisputed geniuses in the world of 20th-century physics was theoretical physicist Richard Feynman, and science enthusiasts will be delighted to learn that Feynman’s incandescent rough drafts of his thoughts and ideas headed to auction on Friday at Sotheby’s in New York, fetching a selling price of 4,922,625 USD.

As will be well-known to many people, Richard Feynman was a great popularizer of physics, and wrote entertaining and informative classics like S urely You’re Joking, Mr. Feynman, The Pleasure of Finding Things Out, QED: The Strange Theory of Light and Matter, and What Do You Care What Other People Think? As The New York Times reminds us, Feynman also played a crucial role in determining what had caused the devastating loss of the space shuttle Challenger.

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Nov 30, 2018

We could move to another planet with a spaceship like this

Posted by in categories: employment, physics, space travel

Proxima b, our nearest neighboring exoplanet, is almost 25 trillion miles away. Even one of our fastest spaceships—the 31,600-mile-per-hour New Horizons—would take hundreds of thousands of years to get there. Assuming we can’t figure out how to warp space-time (seems unlikely, but fingers crossed), we’re still looking at a couple-hundred-year trip in the best-case scenario, which leads to the real problem: No human crew could survive the entire ride. Science-fiction writers have long floated so-called generation ships as a solution. Designers would outfit these interplanetary cruise vessels to support a community of adults and their children, and their children’s children, and their children’s children’s children…until humanity finally reaches a new celestial shore. Here’s our best guess for what it would take to sow the seeds of an extrasolar species.

Career planning

Successive generations need to fill all the vital crew roles—such as medics and mechanics—which doesn’t leave much room for freedom of choice. A version of modern career tests would assign occupations based on aptitude, passions, and available jobs.

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Nov 29, 2018

Study unlocks full potential of ‘supermaterial’ graphene

Posted by in categories: computing, physics, solar power, sustainability

New research reveals why the “supermaterial” graphene has not transformed electronics as promised, and shows how to double its performance and finally harness its extraordinary potential.

Graphene is the strongest material ever tested. It’s also flexible, transparent and conducts heat and electricity 10 times better than copper.

After graphene research won the Nobel Prize for Physics in 2010 it was hailed as a transformative material for flexible electronics, more powerful computer chips and solar panels, water filters and bio-sensors. But performance has been mixed and industry adoption slow.

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Nov 28, 2018

Scientists Build Atomic Clocks Accurate Enough to Measure Changes in Spacetime Itself

Posted by in categories: physics, space

Physicists have created atomic clocks so precise that they can measure deformations in spacetime itself, according to new research.

We don’t all experience time passing equally—time passes more slowly closer to something massive’s gravitational pull, as famously theorized by Albert Einstein. And since gravity is typically interpreted as the way mass warps space itself, that means a precise-enough atomic clock could serve as a scientific tool for measuring how objects change the shape of their surrounding space.

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Nov 27, 2018

Michio Kaku — The Physics of Back to the Future — The River of Time

Posted by in categories: futurism, physics

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Nov 27, 2018

How scientists are working together to solve one of the universe’s mysteries

Posted by in categories: alien life, physics

All of these facts may make it sound as though scientists know a lot about Fast Radio Bursts. In reality, we don’t. For instance, though we know they’re not from our galaxy, we don’t know where exactly they come from. We don’t know what causes them. And we’re not sure whether they might be useful as cosmological standards to measure the large scale properties of our universe.

Dozens of theories about Fast Radio Bursts have been proposed. Some conform to standard physics. Others are more exotic, including cosmic strings – hypothetical, one-dimensional structures formed in the early universe – or even rather bizarre: one theory suggests that aliens are responsible.

Now, in an attempt to discover the truth about Fast Radio Bursts, we have created a catalogue that lists each theory, along with its pros and cons. Scientists from around the world can weigh in, and new data and discoveries will be added throughout the process.

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