Scientists at Tokyo Institute of Technology and Keio University investigated the excitation and detection of photogenerated coherent phonons in polar semiconductor GaAs through an ultrafast dual pump-probe laser for quantum ...
Optics & Photonics
May 22, 2019
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103
(Phys.org) —A versatile NASA airborne imaging radar system is showcasing its broad scientific prowess for studying our home planet during a month-long expedition over the Americas.
Earth Sciences
Apr 4, 2013
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(PhysOrg.com) -- An airborne radar developed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., has returned to Hawaii to continue its study of Kilauea volcano, Hawaii's current most active volcano.
Earth Sciences
Jan 10, 2012
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When waves meet, a new single wave is created. This phenomenon is well understood for mechanical waves such as sound, and electro-magnetic waves such as light, and the "interference" of light waves is applied in astronomy, ...
Biochemistry
Jul 20, 2011
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(PhysOrg.com) -- This Envisat Advanced Synthetic Aperture Radar interferogram over the Kenyan section of the Great Rift Valley shows small surface displacements that are not visible to the naked eye of the Longonot (front ...
Earth Sciences
Jul 2, 2010
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Future telescopes, with mirrors half the size of a football field, will need special components to deal with the light they collect. Astronomers are turning to photonic devices that guide and manipulate light inside specially-designed ...
General Physics
Feb 5, 2009
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When astronomers talk about an optical telescope, they often mention the size of its mirror. That's because the larger your mirror, the sharper your view of the heavens can be. It's known as resolving power, and it is due ...
Astronomy
Feb 24, 2020
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79
This ESA test bench is usually shrouded in darkness, except for the laser beam being projected across it.
Space Exploration
Apr 22, 2015
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30
Kilauea Volcano in Hawaii experienced its first summit eruption in 26 years when a new vent along the east wall of Halema'uma'u Crater opened in March 2008. Since that time, the vent has become wider as parts of the wall ...
Earth Sciences
Mar 29, 2013
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0
(PhysOrg.com) -- Astronomers will tie together the largest collection of the world's radio telescopes ever assembled to work as a single observing tool in a project aimed at improving the precision of the reference frame ...
Astronomy
Nov 16, 2009
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