Interferometry is a measurement technique that exploits the superposition of coherent waves, typically electromagnetic or matter waves, to extract precise information from the resulting interference pattern. By splitting a wavefront into multiple paths that traverse different optical or physical conditions and then recombining them, interferometry enables highly sensitive determination of path length differences, refractive index variations, surface topography, displacements, and phase shifts. It underpins applications such as optical metrology, gravitational wave detection, astronomical aperture synthesis, and coherence characterization, with performance determined by factors including coherence length, phase stability, wavelength, and environmental noise control.
Radio telescopes are instruments that capture faint radio signals from space and convert them into images of celestial bodies. To observe distant black holes clearly, multiple radio telescopes must capture cosmic signals ...
Astronomy
Jan 15, 2026
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A quantum trick based on interferometric measurements allows a team of researchers at LMU to detect even the smallest movements of a laser beam with extreme sensitivity.
Optics & Photonics
Jan 8, 2026
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106
In a study published in Nature Methods on December 2, a research team led by Profs. Xu Tao and Ji Wei from the Institute of Biophysics of the Chinese Academy of Sciences has developed a three-dimensional interferometric localization ...
Biotechnology
Dec 16, 2025
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41
In 1887, one of the most important experiments in the history of physics took place. American scientists Michelson and Morley failed to measure the speed of Earth by comparing the speed of light in the direction of Earth's ...
General Physics
Nov 19, 2025
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A new method for measuring three different properties of light, at the same time, has been developed using an interferometry-based quantum sensing scheme capable of simultaneously estimating multiple parameters of an optical ...
Optics & Photonics
Nov 10, 2025
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88
Last week, four lasers were projected into the sky above the European Southern Observatory (ESO) Paranal site in Chile. The lasers successfully created an "artificial star" that astronomers can use to measure and then correct ...
Astronomy
Nov 10, 2025
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63
The world's most sensitive table-top interferometric system—a miniature version of miles-long gravitational-wave detectors like LIGO—has completed its first science run.
General Physics
Oct 9, 2025
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402
Gravitational-wave detection technology is poised to make a big leap forward thanks to an instrumentation advance led by physicist Jonathan Richardson of the University of California, Riverside. A paper detailing the invention, ...
Optics & Photonics
Sep 27, 2025
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244
In quantum mechanics, particles such as electrons act like waves and can even interfere with themselves—a striking and counterintuitive feature that defies our classical view of reality. We know this kind of interference ...
Optics & Photonics
Sep 19, 2025
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92
LIGO, the Laser Interferometer Gravitational-wave Observatory, has been called the most precise ruler in the world for its ability to measure motions more than 10,000 times smaller than the width of a proton. By making these ...
Astronomy
Sep 4, 2025
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