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(analysis of superimposed EMR waves)

Interferometry is the use and analysis of superimposed electromagnetic radiation waves. The patterns produced by waves from slightly different directions or wavelengths include information about relative directions and wavelengths. A device carrying out this function is called an interferometer.

Radio astronomy makes much use of interferometry (radio interferometry), using multiple radio telescopes (dishes) to achieve a higher angular resolution. Keck Observatory and other twin/multiple telescopes can be used for interferometry of visible light (optical interferometry). A type of imaging spectrograph, the imaging Fourier transform spectroscopy makes use of a type of interferometry.

Gravitational wave detectors such as LISA also use interferometry to measure the extremely short distances involved.


Referenced by:
angular resolution
electronic very-long-baseline interferometry (e-VLBI)
infrared (IR)
New Gravitational Wave Observatory (NGO)
optical interferometer
Queen's University Radio Observatory (QRO)
radio astronomy
speckle suppression
spectral correlator
stellar radius determination
Very Large Array (VLA)
very-long-baseline interferometry (VLBI)