Researchers at Institut national de la recherche scientifique (INRS) have discovered a cost-effective way to tune the spectrum of a laser to the infrared, a band of great interest for many laser applications. They collaborated ...
Optics & Photonics
Oct 14, 2020
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13
Anybody who has been passed by an ambulance at high speed has experienced a physical effect called the Doppler shift: As the ambulance moves toward the listener, its motion compresses the siren's sound waves and raises the ...
Plants & Animals
Jun 5, 2019
1
254
At a microscopic level, every material contains spontaneous sound waves—acoustic phonons—that have properties dependent on the material's mechanical properties. When light interacts with these acoustic phonons, it scatters ...
General Physics
May 17, 2016
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16
(Phys.org) —Nuclear magnetic resonance—that phenomenon where nuclei of certain atoms, when in a magnetic field, take in and give off measurable amounts of electromagnetic radiation—is everywhere.
General Physics
Sep 5, 2013
2
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(Phys.org) —Researchers in Scotland have devised a way to use the Doppler Effect to discern the spin speed of a rotating object where the object is directly facing the light source. In their paper published in the journal ...
A caesium fountain clock that keeps the United Kingdom's atomic time is now the most accurate long-term timekeeper in the world, according to a new evaluation of the clock that will be published in the October 2011 issue ...
General Physics
Aug 26, 2011
7
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