News tagged with refractive index
Related topics: light
Invisibility cloaks may be just around the corner
In 1897, H.G. Wells created a fictional scientist who became invisible by changing his refractive index to that of air, so that his body could not absorb or reflect light. More recently, Harry Potter disappeared ...
Mar 04, 2011 |
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Newly developed cloak hides underwater objects from sonar
In one University of Illinois lab, invisibility is a matter of now you hear it, now you don't.
Jan 05, 2011 |
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Imitation black hole seen on earth
Astrophysics deals mostly with things that are so distant -- thousands or billions of light years away -- that we can't ever hope to see them up close. But clever scientists can do the next best thing to making ...
Sep 30, 2010 |
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Physicists may have observed Hawking radiation for the first time
(PhysOrg.com) -- In 1974, Stephen Hawking predicted that black holes emit thermal radiation due to quantum effects, which causes the black holes to lose mass and perhaps ultimately vanish. But despite numerous ...
Sep 28, 2010 |
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New findings promising for 'transformation optics,' cloaking
Researchers have overcome a fundamental obstacle in using new "metamaterials" for radical advances in optical technologies, including ultra-powerful microscopes and computers and a possible invisibility cloak.
Aug 04, 2010 |
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Improved telescope sees through atmosphere with pinpoint sharpness
A sharp view of the starry sky is difficult, because the atmosphere constantly distorts the image. Eindhoven University of Technology researcher Roger Hamelinck developed a new type of telescope mirror, which quickly corrects ...
Jun 24, 2010 |
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Researchers analyze performance of first updatable holographic 3D display
(PhysOrg.com) -- In 2008, researchers from the University of Arizona created a holographic 3D display that could write and erase images, making it the first updatable (or rewritable) holographic 3D display ...
May 26, 2010 |
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A table top 3D laserprinter for glass microsystems
Dr. Yves Bellouard of the Department of Mechanical Engineering is coordinator of a new European project, Femtoprint, to be started this month. The goal is to design a convenient 3D laser printer that will ...
May 13, 2010 |
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Light twists rigid structures in unexpected nanotech finding
(PhysOrg.com) -- In findings that took the experimenters three years to believe, University of Michigan engineers and their collaborators have demonstrated that light itself can twist ribbons of nanoparticles.
Mar 17, 2010 |
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Toshiba, AIST Develop Mask Pattern Optimizing Technology That Extends Life of Optical Lithography
Toshiba and Japan's National Institute of Advanced Industrial Science and Technology (AIST) today announced joint development of a mask pattern optimizing technology that improves the accuracy of lithography ...
Feb 15, 2010 |
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'Cinderella' - biaxial liquid crystal - is found at last
Recent research at the DUBBLE beamline has proved the existence of liquid crystals with two main axes. Liquid crystals with a single main axis are already used in LCDs (liquid crystal displays), but crystals ...
Feb 12, 2010 |
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Stacking the deck: Single photons observed at seemingly faster-than-light speeds
Researchers at the Joint Quantum Institute (JQI), a collaboration of the National Institute of Standards and Technology and the University of Maryland at College Park, can speed up photons (particles of light) ...
Jan 26, 2010 |
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Beyond the looking glass...
While the researchers can't promise delivery to a parallel universe or a school for wizards, books like Pullman's Dark Materials and JK Rowling's Harry Potter are steps closer to reality now that researchers ...
Aug 13, 2009 |
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Measuring the Speed of Light in Composite Materials
(PhysOrg.com) -- Although the speed of light is constant in a vacuum, light slows down a small amount when traveling through other materials. While it's relatively easy to measure the speed of light in mediums ...
Aug 02, 2009 |
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Liquid lens creates tiny flexible laser on a chip
(PhysOrg.com) -- Like tiny Jedi knights, tunable fluidic micro lenses can focus and direct light at will to count cells, evaluate molecules or create on-chip optical tweezers, according to a team of Penn State engineers. ...
May 11, 2009 |
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