tagged w/ Light
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‘Time cloak’ hid event in experiment, physicists say
By David Brown, Published: January 4
A team of physicists at Cornell University has created a wrinkle in time. Actually, it’s more like a teeny tiny moth hole in time. Inside it things can occur that are entirely undetectable, at least to ordinary observers. It’s as if they never happened.
This phenomenon, known as “temporal cloaking,” is the latest addition to a world that once existed only in children’s literature and science fiction — a place where objects are invisible and events are unrecorded.
Top physics stories of 2011: These events and discoveries make up the key stories in the field of physics this year.
Some of the world’s greatest inventions have science fiction to thank for their easy-adoption and popularity among consumers.
The physics community let out a small gasp six years ago when researchers reported the first successful “spatial cloaking,” in which light is bent around an object in a way that makes it disappear from view. The new report in the journal Nature shows how they can play with something that would seem to be even harder to manipulate: the perception of time.
“We think of time in the way that other people think of space. What other people are doing in space, we can do it in time,” said Moti Fridman, a researcher at the School of Applied and Engineering Physics at Cornell University .
“I think it’s a big step forward,” said Vladimir M. Shalaev, a professor of electrical and computer engineering at Purdue University, who has worked on spatial cloaking. “It’s another example of the beauty of ‘transformational optics,’ which is behind all these ideas.”
Temporal cloaking, like spatial cloaking, is not magic. It follows all the ironclad laws of physics and is to some extent a parlor trick, albeit performed in a highly unusual parlor. Whether it will have a use isn’t known, as the hole in time created by the Cornell team lasts only 50 trillionths of a second.
“It is not enough time to steal a painting from a museum,” Fridman said, joking. He added that there might nevertheless be practical uses of the technology.
Cloaking things, either in space or in time, requires the manipulation of light. Light carries information; it bounces off objects, defining their shape and sending those details to detectors such as our eyes. If an object can prevent light from doing that, it will become invisible.
But because light travels and has speed, it also defines when something happens. The lightening and darkening that occurs when a beam of light illuminates an event marks the event in time. If something can happen and yet leave the light unperturbed, which is the essence of temporal cloaking, then the event can become as invisible as a cloaked object.
Those manipulations are possible because of man-made substances that behave in ways that natural substances don’t. The extreme bending of light that makes spatial cloaking possible requires so-called optical metamaterials made through nanotechnology. Temporal cloaking depends on special lasers and optical fibers that disperse or undisperse light in predictable ways.
In their experiment, previewed this summer in an online archive and reported in detail in Nature on Tuesday, Fridman and his collaborators sent a laser beam of light down a fiber-optic cable. At the starting end of the cable, they pulsed the beam with a second laser that changed the light from a single wavelength to a range of wavelengths, essentially different colors.‘Time cloak’ hid event in experiment, physicists say
By David Brown,... more
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“Light” is a mesmerizing two-minute short film directed by David Parker for Sunday Paper. The film was shot over a couple nights in Los Angeles as two friends drove around with a camera exploring the city’s architecture and abandoned landscapes. Their work evolved into a project intended to bring awareness to energy waste. Bleeding, crying lights metaphorically parallel the ways in which we squander our natural resources without much thought. While the original sentiment remains, the film also grew into a poetic statement about a world run wild and the human tendency to exploit that which we hold dear.
This piece includes a number of color photographs, as well as the wonderful short film.
http://disembedded.wordpress.com/2011/11/18/let-there-be-light/“Light” is a mesmerizing two-minute short film directed by David Parker... more
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In the search for extraterrestrial intelligence, astronomers have hunted for radio signals and ultra-short laser pulses. In a new paper, Avi Loeb (Harvard-Smithsonian Center for Astrophysics) and Edwin Turner (Princeton University) suggest a new technique for finding aliens: look for their city lights.
link:
http://www.sciencedaily.com/releases/2011/11/111103190356.htmIn the search for extraterrestrial intelligence, astronomers have hunted for radio... more
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sitsi
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added this
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3 months ago
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Diwali, the Hindu festival of lights, stretches beyond India, a five-day holiday encompassing multiple stories from around the world, involving Hindus, some Buddhists, Sikhs and Jains. For India, however, where roughly 80 percent of the population practices Hinduism, Diwali 2011 is and will be a massive and deeply Hindu affair, one involving dancing, shows, religious worship and lots of fireworks.
Diwali, or Divali, means "row of lights," and is a celebration of the Hindu New Year according to the lunisolar calendar. Typically, Diwali also falls near the end of harvest season, from mid-October to mid-November, meaning the goddess Lakshmi, who brings wealth and prosperity, is honored by the holiday with candle offerings and bright, festive decorations.
It is also, however, a more general celebration of good over evil, especially that of Rama's victory over the 10-headed demon Ravana in the Hindu epic "The Ramayana." Rama, an incarnation of the Hindu god Vishnu, returns home during Diwali (Oct. 26, in 2011) after fourteen years of banishment, and Hindus lay out lamps, set off fireworks, and hang paper lanterns to help light his way home.
All these traditions combine to make Diwali a true "festival of lights," from those dedicated to Lakshmi and celebrating Rama to Hindus honoring Ganesh, the God of good beginnings, on this gorgeous holiday. While the story behind Diwali and how people celebrate may vary from region to region, the holiday's essence remains the same: rejoicing at the victory of goodness, light, and atman (the soul) over falseness, darkness, and reality.Diwali, the Hindu festival of lights, stretches beyond India, a five-day holiday... more
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USB Flexible Fan with LED Light device Unboxing Review by OSyTech
Follow on Twitter: http://twitter.com/#!/OSyTech
Original video production by the http://www.OSGUI.com Tech Show.USB Flexible Fan with LED Light device Unboxing Review by OSyTech
Follow on Twitter:... more
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THE LIGHTBRINGERS: The Emissaries of Jahbulon (History of Freemasonry)
53:21 - 5 years ago
This film by Jüri Lina tells about what kind of light and how the Emissaries of Jahbulon spread it around themselves and how it affects us. An exciting excursion to some of the most powerful Masonic lodges in the United States and in Europe. [IF YOU WANT TO KNOW ALL THERE IS TO KNOW ABOUT THE HISTORY OF THE MASONS (freemasons, illuminati, etc) WATCH THIS FILM!]THE LIGHTBRINGERS: The Emissaries of Jahbulon (History of Freemasonry)
53:21 - 5... more
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The Invisible Painting by Dapacu with light from the back.
Pause the video and observe the Masterpiece.
Welcome to the latest release of a Masterpiece of Dapacu.
The Invisible Painting by Dapacu.
Oil Painting. The Masterpiece has effect of stereogram’s and the best is in the extreme details that create a whole new world by distance, a macro world, see the inches of the Masterpiece. http://virtualshops.tv/THE_INVISIBLE_PAINTING_BY_DAPACU_CIRCA_2010-_2011.html
What do you see?
The latest release with zooms of the masterpiece, “The Invisible Painting” :The Invisible Painting by Dapacu with light from the back.
Pause the video and... more
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Researchers at Wake Forest University have developed a new type of polymer solar-thermal device that combines photovoltaics with a system that captures the Sun's infrared radiation to generate heating.
link:http://www.gizmag.com/solar-thermal-cell/18346/Researchers at Wake Forest University have developed a new type of polymer... more
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This film is a short insight in the happenings on 28th December 2010 in Bolton Market, karachi, Pakistan where after an blast during a procession, 100's of shops were burned down by the people for the people in an organized planned manner. Not only our culture and heritage but 1000's of lives went into flames. What we have become is the product of our own doings and this is what this film emphasizes on.
A Catalyst By Fate, A Believer By Choice http;//www.ozairrao.comThis film is a short insight in the happenings on 28th December 2010 in Bolton Market,... more
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Latest Complete News Updates Today The Zodiac Killer claimed to have murdered 37 people. The killings, which paralyzed Californians with fear for years, began in 1968, and soon after mysterious letters were sent to news outlets, many featuring cryptograms.Latest Complete News Updates Today The Zodiac Killer claimed to have murdered 37... more
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We can all walk the same path Christ did to reach the enlightenment that opens the door to the true meaning of life and our purpose on this Earth. All it takes is a willingness to see inside ourselves and to reflect on the higher spiritual meaning of the life of Christ which reflects the light in our own being.
At this time of year it is the spiritual and moral message of Christ the teacher that I reflect upon. The Gnostic Gospels speak of a Jesus the Church sought to dismiss. Through the discovery of the Gnostic Gospels in Egypt a new perspective on an ancient and mystical message that can lead to great transformation of the spirit has also been uncovered, and it is yours to research.
However you celebrate this message, may the light in the Christ lead you to the discovery of the divine spark in yourself and the shedding of that light upon the world through your own gnosis to preserve it.
Happy holidays.We can all walk the same path Christ did to reach the enlightenment that opens the... more
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A very cool touchscreen interaction piece to show off the Tron premiere. If your entertained by shapes and lights, watch it.
"Old-time skaters ENESS jumped at the chance to bring skateboarding into the future by blending interactivity and high-tech mastery for the Tron Legacy premiere.
Each rider is equipped with an ipod and our custom-built app to measure their air time and trigger graphics whilst in the air and on landing."-VimeoA very cool touchscreen interaction piece to show off the Tron premiere. If your... more
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As the name implies, free space optics uses light to transmit data, much the same way as fiber optics systems but through the air, not over a fiber line. Founded in 1996, SkyFiber is hardly a new company, but for most of its existence it’s been flying under the radar, researching optical technologies and accruing patents. According to CEO David Achim, its success in patenting much of free space optics intellectual property is what forced Terabeam to ultimately get out of the business. Last year, SkyFiber decided that its technology and its market were ready for commercial deployments. It raised $32 million in venture funding and began trialing its equipment with local governments and wireless operators and is now set to start selling its SkyLink product commercially.
“Free space optics was an overhyped, overpromised and under-delivered technology that left a bad taste in people’s mouths’,” Achim said, explaining why the technology fell off the radar after Terabeam’s initial trials. But SkyFiber has managed to optimize the technology to overcome its original shortcomings, which were primarily related to range and weather conditions...
http://connectedplanetonline.com/3g4g/news/skyfiber-optical-wireless-061610/As the name implies, free space optics uses light to transmit data, much the same way... more
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They said the Kinect hack would produce some great interactive art projects and it looks like a great fun one is already into development.
From the video, they used the hack to create a interactive puppet which projects onto your wall. The bird is controlled with elbow, wrist and hand movement and speaks when you open and close your hand.
Neatorama says the idea was built in one day, can't wait for more.
"If you're interested in making projects with the Kinect and openFrameworks check out the addon as it progresses on the OF forums. openframeworks.cc/forum/viewtopic.php?p=24948#p24948
Also keep an eye on the libfreenect GitHub for latest updates to the driver - github.com/OpenKinect/libfreenect/"-VimeoThey said the Kinect hack would produce some great interactive art projects and it... more
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We often look up at the sky at night and wonder at the stars, but from space Earth has its own impressive light show.
These pictures taken by an astronaut on the International Space Station show London, Paris lit up at night, the southern Mediterranean including Ibiza and Majorca and the light of towns snaking down the river Nile from Cairo.
One shot even captures the green northern lights spread out across the top of the earth above Britain.
Link: http://www.dailymail.co.uk/sciencetech/article-1328467/Spectacular-night-time-photos-Earth-taken-space-station.htmlWe often look up at the sky at night and wonder at the stars, but from space Earth has... more
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Mice exposed to light at night gained 50 percent more weight than mice whose nights were truly dark, the study found, even though the two groups ate equal amounts of food and got the same amount of exercise.
link: http://news.discovery.com/human/light-obesity-weight-gain.htmlMice exposed to light at night gained 50 percent more weight than mice whose nights... more
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eva2
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added this
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1 year ago
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"...use photographic and animation techniques that were developed to draw moving 3-dimensional typography and objects with an iPad. In dark environments,...
http://vimeo.com/14958082"...use photographic and animation techniques that were developed to draw moving... more
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