Science Fiction Dictionary
A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

 

Vortex Rings Of Light

Toroidal (ring-shaped) vortices are not uncommon in nature and science. Indeed, aquarium visitors are often amazed at how dolphins master creating and playing with bubble rings, which are air-filled vortex rings propagating in water. Smokers can similarly create smoke rings. The scientific investigation of vortex rings dates back to 1867, when Lord Kelvin proposed the vortex atom model.

Optics researcher Qiwen Zhan and colleagues started from a vortex tube, a hurricanelike structure they already knew how to create using laser light. The team used optics techniques to bend the tube into a circular shape, creating a vortex ring.

(Via ScienceNews)


(Vortex Rings of Light)
The ring’s surface is illustrated in transparent purple
and a hollow core is shown in orange. Rainbow arrows
show the rotation of the vortex, and white arrows indicate
a type of angular momentum of the light.

Toroidal vortices, also known as vortex rings, are whirling, closed-loop disturbances that form a characteristic ring shape in liquids and gases and propagate in a direction that is perpendicular to the plane of the ring. They are well-studied structures and commonly found in various fluid and gas flow scenarios in nature, for example in the human heart, underwater air bubbles and volcanic eruptions.

Here we report the experimental observation of a photonic toroidal vortex as a new solution to Maxwell’s equations, generated by the use of conformal mapping. The resulting light field has a helical phase that twists around a closed loop, leading to an azimuthal local orbital angular momentum density.

The preparation of such an intriguing state of light may offer insights for exploring the behaviour of toroidal vortices in other disciplines and find important applications in light–matter interactions, optical manipulation, photonic symmetry and topology, and quantum information.

(Via Toroidal vortices of light)

In his 1976 novel The Space Beyond, science fiction writer and editor John W. Campbell described a magnetic projector that projects a vortex of magnetic force:

He took the other pistol, and raised it. It was a stock, surmounted by a sphere, glowing as the other, but the barrel here was a curious thing, a straight tube of the insulating material, with metal ribs running lengthwise, but surrounded by toroidal coils set at progressively changing angles. The barrel was nearly two feet long. This was a shoulder weapon, and a harness of stout leather belts bound it to the shoulder, as though a pull rather than a kick were expected.

Further, the sphere here was nearly eight inches in diameter, and set low, below the barrel. Thaen pointed it toward a block of iron that must have weighed some ten pounds, resting on a bench some other men had set up. He pressed the release button, and from the inch-wide muzzle a stream of blue-glowing rings sprang, rushed swiftly to the iron, and bathed it in soft light. Instantly the iron jumped, Thaen stiffened, and the weight leaped from the table toward the gun. As it reached the edge it fell, and the gun was dragged downward with it. It struck the floor, and traveled swiftly toward the weapon. Infive seconds it was at Thaen's feet, and he shut off the device. The rings died out, the iron slid to a stop...

"...ring lightning instead of ball, and the rings are spinning about their common axis! A charge moving in a circle, makes a magnetic field—selenoid effect—with a long, long coil."

Thanks to Winchell Chung (aka @nyrath) of ProjectRho for providing the article and science fiction quotes.

Scroll down for more stories in the same category. (Story submitted 5/29/2022)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Engineering ")

SolarXOne Solar-Powered Drone Flies (almost) Forever
'It's an Indian Air Force drone; its solar cells could power an entire farm.' - Interstellar.

Experts Decry Planet-Scale Schemes To Limit Global Heating
'Light from the sun hit those little spheres and bounced.' - Neal Stephenson, 2021.

Shine On, Portable Wind Turbine
'Sometimes a man has a windmill on his roof...' - John Jacob Astor IV, 1894.

The Mojo Smart Contact Lens Experience
'... the lens displays would be useless without a wearable computer to do the graphics.' - Vernor Vinge, 2001.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

Science Fiction Timeline
1600-1899
1900-1939
1940's   1950's
1960's   1970's
1980's   1990's
2000's   2010's

Current News

CyberOne Robot By Xiaomi vs. Optimus Robot By Tesla
'I shall introduce myself... I am a robot.'

Giving Snakes Their Legs Back
Then some unknown race had chanced upon the dreamers and decided to 'help them out.'

'Ring Nation' Show Predicted By William Gibson In 1999
'... you had your trademark Lucky Dragon Global Interactive Video Column outside.'

SolarXOne Solar-Powered Drone Flies (almost) Forever
'It's an Indian Air Force drone; its solar cells could power an entire farm.'

Video! Chess Robot Breaks Opponent's Finger In Match
'A robot may not injure a human being.'

Virtual Co-Embodyment - Two People Control One Virtual Body
'... we were supposed to be forming five unit composites first."

The Wanderer: Eyebot From Fallout, Eye From Zelazny
'We send our eyes on their appointed rounds, and they can hover or soar or back up...'

Experts Decry Planet-Scale Schemes To Limit Global Heating
'Light from the sun hit those little spheres and bounced.'

OrganEx Revives The Organs In Dead Pig
'Wakened into half-life activity one hour a month...'

NAVER Labs Haptic Device 2.0 Robot vs. IKEA
'... the two pairs of waldoes in the screen followed in exact, simultaneous parallelism.'

Spaceships Should Last So Long
'THE SPACE VESSEL was traveling swiftly… For over five thousand years they had Voyaged on and on.’

Shine On, Portable Wind Turbine
'Sometimes a man has a windmill on his roof...'

Amazing Indoor Robotic Drones Mimic Dolphins and Whales
'They circled the vast audiences, dancing, twittering, chirping...'

Space Station Shutters
'The sun-quilt was a patchwork of colors and materials on the inward side, but silvered on the outward side...'

Tiny Mining - Extract Precious Industrial Minerals From Your Own Body
'Jim, I saw them reduce four of my doctors and nurses into those little cubes!'

MIT Proposes Space Bubbles To Combat Climate Change, Misses The Point Of Space Bubbles
'Fats Jordan was hanging in the center of the Big Glass Balloon, hugging his guitar to his massive black belly above his purple shorts..'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.