interferometry
Measuring through wave overlap
Interferometry is a measurement technique that combines waves—usually light or radio waves—to extract precise information about distances, surfaces, or physical properties.
The method works by splitting a wave, sending the parts along different paths, then recombining them; the resulting interference pattern reveals tiny differences between the paths.
Astronomers use interferometry to achieve resolution far beyond what single telescopes can provide, and the technique famously enabled detection of gravitational waves.
The observatory uses radio interferometry to image distant galaxies.
Instrument magnifying faraway objects
- observatoryFacility for celestial study
- baselineStandard for comparison
- astrometryMeasuring celestial body positions
- parallaxPosition change from different vantages
exoplanet · pulsar · quasar · black-hole · gravitational-wave · imaging · resolution · angular
Determining size or amount
- precisionAccuracy of measurement
- nanometerMetric unit, billion-fold smaller
- calibrationAdjusting for measurement accuracy
- flatnessAbsence of slope
displacement · gauge · accuracy · tolerance · resolution · dimensional · standardization · traceability
Outermost edge or margin
- superpositionCoexisting in multiple states
- phaseDistinct period in sequence
- coherenceLogical internal consistency
- wavelengthSpatial repetition interval
amplitude · diffraction · constructive · destructive · monochromatic · wavefront · recombination · node
Concentrated light device
- mirrorReflective viewing surface
- MichelsonPhysicist of optics
- holography3D imaging via laser
- monochromaticOf one hue
reflectance · refraction · collimation · alignment · null · fiber-optic · photonics
Propagating curvature of spacetime
- lithographyGrease-based flat plate printing
- semiconductorPartial electrical conductor
- gyroscopeSpinning disc measuring orientation
- microscopyTechnique using powerful lenses
telescope
Instrument magnifying faraway objects
- observatoryFacility for celestial study
- baselineStandard for comparison
- astrometryMeasuring celestial body positions
parallax · exoplanet · pulsar · quasar · black-hole · gravitational-wave · imaging · resolution · angular · celestial
measurement
Determining size or amount
- precisionAccuracy of measurement
- nanometerMetric unit, billion-fold smaller
- calibrationAdjusting for measurement accuracy
flatness · displacement · gauge · accuracy · tolerance · resolution · dimensional · standardization · traceability · uncertainty
fringe
Outermost edge or margin
- superpositionCoexisting in multiple states
- phaseDistinct period in sequence
- coherenceLogical internal consistency
wavelength · amplitude · diffraction · constructive · destructive · monochromatic · wavefront · recombination · node · antinode
laser
Concentrated light device
- mirrorReflective viewing surface
- MichelsonPhysicist of optics
- holography3D imaging via laser
monochromatic · reflectance · refraction · collimation · alignment · null · fiber-optic · photonics
gravitational-wave
Propagating curvature of spacetime
- lithographyGrease-based flat plate printing
- semiconductorPartial electrical conductor
- gyroscopeSpinning disc measuring orientation
interferometrydirect observation
Watching something personally occur
visual inspection · photometry · spectroscopy · calorimetry · gravimetry