Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Coherence_(physics)> ?p ?o }
- Coherence_(physics) abstract "In physics, two wave sources are perfectly coherent if they have a constant phase difference and the same frequency. It is an ideal property of waves that enables stationary (i.e. temporally and spatially constant) interference. It contains several distinct concepts, which are limiting cases that never quite occur in reality but allow an understanding of the physics of waves, and has become a very important concept in quantum physics. More generally, coherence describes all properties of the correlation between physical quantities of a single wave, or between several waves or wave packets. Interference is nothing more than the addition, in the mathematical sense, of wave functions. A single wave can interfere with itself, but this is still an addition of two waves (see Young's slits experiment). Constructive or destructive interferences are limit cases, and two waves always interfere, even if the result of the addition is complicated or not remarkable.When interfering, two waves can add together to create a wave of greater amplitude than either one (constructive interference) or subtract from each other to create a wave of lesser amplitude than either one (destructive interference), depending on their relative phase. Two waves are said to be coherent if they have a constant relative phase. The amount of coherence can readily be measured by the interference visibility, which looks at the size of the interference fringes relative to the input waves (as the phase offset is varied); a precise mathematical definition of the degree of coherence is given by means of correlation functions. Spatial coherence describes the correlation (or predictable relationship) between waves at different points in space, either lateral or longitudinal. Temporal coherence describes the correlation between waves observed at different moments in time. Both are observed in the Michelson–Morley experiment and Young's interference experiment. Once the fringes are obtained in the Michelson–Morley experiment, when one of the mirrors is moved away gradually, the time for the beam to travel increases and the fringes become dull and finally are lost, showing temporal coherence. Similarly, if in Young's double slit experiment the space between the two slits is increased, the coherence dies gradually and finally the fringes disappear, showing spatial coherence.".
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- Coherence_(physics) wikiPageRevisionID "705470089".
- Coherence_(physics) wikiPageWikiLink Absolute_zero.
- Coherence_(physics) wikiPageWikiLink Acoustics.
- Coherence_(physics) wikiPageWikiLink Atom.
- Coherence_(physics) wikiPageWikiLink Atomic_coherence.
- Coherence_(physics) wikiPageWikiLink Autocorrelation.
- Coherence_(physics) wikiPageWikiLink Bells_theorem.
- Coherence_(physics) wikiPageWikiLink Bose–Einstein_condensate.
- Coherence_(physics) wikiPageWikiLink Category:Concepts_in_physics.
- Coherence_(physics) wikiPageWikiLink Category:Quantum_mechanics.
- Coherence_(physics) wikiPageWikiLink Category:Radar_signal_processing.
- Coherence_(physics) wikiPageWikiLink Category:Wave_mechanics.
- Coherence_(physics) wikiPageWikiLink Coherence_length.
- Coherence_(physics) wikiPageWikiLink Coherence_time.
- Coherence_(physics) wikiPageWikiLink Coherent_states.
- Coherence_(physics) wikiPageWikiLink Convolution_theorem.
- Coherence_(physics) wikiPageWikiLink Correlation_function.
- Coherence_(physics) wikiPageWikiLink Cross-correlation.
- Coherence_(physics) wikiPageWikiLink Degree_of_coherence.
- Coherence_(physics) wikiPageWikiLink Dennis_Gabor.
- Coherence_(physics) wikiPageWikiLink Density_matrix.
- Coherence_(physics) wikiPageWikiLink Diffraction.
- Coherence_(physics) wikiPageWikiLink Dispersion_(optics).
- Coherence_(physics) wikiPageWikiLink Double-slit_experiment.
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- Coherence_(physics) wikiPageWikiLink Electromagnetism.
- Coherence_(physics) wikiPageWikiLink Electron.
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- Coherence_(physics) wikiPageWikiLink Frequency-resolved_optical_gating.
- Coherence_(physics) wikiPageWikiLink Gyroscope.
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- Coherence_(physics) wikiPageWikiLink Helium–neon_laser.
- Coherence_(physics) wikiPageWikiLink Holography.
- Coherence_(physics) wikiPageWikiLink Intensity_(physics).
- Coherence_(physics) wikiPageWikiLink Interference_(wave_propagation).
- Coherence_(physics) wikiPageWikiLink Interferometric_visibility.
- Coherence_(physics) wikiPageWikiLink Interferometry.
- Coherence_(physics) wikiPageWikiLink Kxc3xbcpfmxc3xbcllers_uncertainty_principle.
- Coherence_(physics) wikiPageWikiLink Laser.
- Coherence_(physics) wikiPageWikiLink Laser_linewidth.
- Coherence_(physics) wikiPageWikiLink Light.
- Coherence_(physics) wikiPageWikiLink Mach–Zehnder_interferometer.
- Coherence_(physics) wikiPageWikiLink Macroscopic_quantum_phenomena.
- Coherence_(physics) wikiPageWikiLink Macroscopic_scale.
- Coherence_(physics) wikiPageWikiLink Matter_wave.
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- Coherence_(physics) wikiPageWikiLink Michelson_interferometer.
- Coherence_(physics) wikiPageWikiLink Michelson–Morley_experiment.
- Coherence_(physics) wikiPageWikiLink Microwave.
- Coherence_(physics) wikiPageWikiLink Neuroscience.
- Coherence_(physics) wikiPageWikiLink Nonlinear_optics.
- Coherence_(physics) wikiPageWikiLink Optical_autocorrelation.
- Coherence_(physics) wikiPageWikiLink Optical_coherence_tomography.
- Coherence_(physics) wikiPageWikiLink Optical_heterodyne_detection.
- Coherence_(physics) wikiPageWikiLink Optics.
- Coherence_(physics) wikiPageWikiLink Phase_(waves).
- Coherence_(physics) wikiPageWikiLink Phased_array.
- Coherence_(physics) wikiPageWikiLink Physical_quantity.
- Coherence_(physics) wikiPageWikiLink Physics.
- Coherence_(physics) wikiPageWikiLink Polarization_(waves).
- Coherence_(physics) wikiPageWikiLink Polarizer.
- Coherence_(physics) wikiPageWikiLink Quantum_Zeno_effect.
- Coherence_(physics) wikiPageWikiLink Quantum_computing.
- Coherence_(physics) wikiPageWikiLink Quantum_cryptography.
- Coherence_(physics) wikiPageWikiLink Quantum_decoherence.
- Coherence_(physics) wikiPageWikiLink Quantum_mechanics.
- Coherence_(physics) wikiPageWikiLink Quantum_state.
- Coherence_(physics) wikiPageWikiLink Quantum_superposition.
- Coherence_(physics) wikiPageWikiLink Radio_telescope.
- Coherence_(physics) wikiPageWikiLink Radio_wave.
- Coherence_(physics) wikiPageWikiLink Roy_J._Glauber.
- Coherence_(physics) wikiPageWikiLink Sagnac_effect.
- Coherence_(physics) wikiPageWikiLink Slinky.
- Coherence_(physics) wikiPageWikiLink Sound.
- Coherence_(physics) wikiPageWikiLink Spectral_phase_interferometry_for_direct_electric-field_reconstruction.
- Coherence_(physics) wikiPageWikiLink Superconductivity.
- Coherence_(physics) wikiPageWikiLink Superfluidity.
- Coherence_(physics) wikiPageWikiLink Superposition_principle.
- Coherence_(physics) wikiPageWikiLink Surface_wave.
- Coherence_(physics) wikiPageWikiLink Thomas_Young_(scientist).
- Coherence_(physics) wikiPageWikiLink Ti-sapphire_laser.
- Coherence_(physics) wikiPageWikiLink Transmission_line.
- Coherence_(physics) wikiPageWikiLink Uncertainty_principle.
- Coherence_(physics) wikiPageWikiLink Wave.
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- Coherence_(physics) wikiPageWikiLink Wave_packet.
- Coherence_(physics) wikiPageWikiLink White_noise.
- Coherence_(physics) wikiPageWikiLink Youngs_interference_experiment.
- Coherence_(physics) wikiPageWikiLink File:Coherent_superposition.svg.
- Coherence_(physics) wikiPageWikiLink File:Interference_finite_coherence.png.
- Coherence_(physics) wikiPageWikiLink File:Phase_drift.png.
- Coherence_(physics) wikiPageWikiLink File:Single_frequency_correlation.svg.