News tagged with radiation theory
The new world of gamma-ray optics
Scientists discover that certain materials like silicon or gold exhibit a surprisingly large refractive index for extremely high energetic gamma-rays.
May 14, 2012 |
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Physicists propose test for loop quantum gravity
(PhysOrg.com) -- As a quantum theory of gravity, loop quantum gravity could potentially solve one of the biggest problems in physics: reconciling general relativity and quantum mechanics. But like all tentative ...
Jan 03, 2012 |
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Mechanical micro-drum cooled to quantum ground state
Showcasing new tools for widespread development of quantum circuits made of mechanical parts, scientists from the National Institute of Standards and Technology have demonstrated a flexible, broadly usable ...
Jul 06, 2011 |
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Scientists use light signatures to track merging supermassive black holes
Scientists pursuing supermassive black holes suspect that these giants merge somewhere in the universe roughly once a year, but they don't know how to find them. They think the evidence is hidden in the powerful gravitational ...
Nov 08, 2010 |
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Planck Mission: Space Probe Peers Into Dark Cosmos
(PhysOrg.com) -- Imagine watching the birth of the universe -- the Big Bang -- from the outside. What would you have seen?
Jun 10, 2010 |
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Probing the dark side of the universe
Advancing into the next frontier in astrophysics and cosmology depends on our ability to detect the presence of a particular type of wave in space, a primordial gravitational wave. Much like ripples moving ...
May 20, 2010 |
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NASA to Probe the Universe's First Moments
(PhysOrg.com) -- Sophisticated new technologies created by NASA and university scientists are enabling them to build an instrument designed to probe the first moments of the universe's existence.
Space & Earth / Space Exploration
Apr 29, 2010 |
4.6 / 5 (8) |
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Gamma-ray photon race ends in dead heat; Einstein wins this round
Racing across the universe for the last 7.3 billion years, two gamma-ray photons arrived at NASA's orbiting Fermi Gamma-ray Space Telescope within nine-tenths of a second of one another. The dead-heat finish ...
Oct 28, 2009 |
4.6 / 5 (37) |
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Fermi Telescope Caps First Year With Glimpse of Space-Time (w/ Video)
During its first year of operations, NASA's Fermi Gamma Ray Space Telescope mapped the extreme sky with unprecedented resolution and sensitivity. It captured more than one thousand discrete sources of gamma ...
Oct 28, 2009 |
4.6 / 5 (14) |
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Study confirms classic theory on the origins of biodiversity
(PhysOrg.com) -- A Cornell study on the diversity of milkweed plants has used new techniques to prove an old theory that explains how the arms race between attacking insects and defended plants led to great ...
Sep 09, 2009 |
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