Difference between revisions of "Coherent"
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Revision as of 11:21, 17 May 2024
Key Stage 5
Meaning
Two sources of waves are coherent if they emit waves with a constant phase difference.
About Coherence
Coherent sources produce waves that are in sync, having a constant phase relationship.
Necessary for producing clear interference patterns.
Coherent waves are typically monochromatic and have the same frequency.
Essential in applications like lasers, holography, and interferometry.
Coherence can be temporal (constant phase difference over time) or spatial (constant phase difference
across space).
The degree of coherence affects the visibility and contrast of interference fringes.
Achieving coherence often involves stabilizing the frequency and phase of the wave sources.
Examples
Laser light is coherent and can produce clear interference and diffraction patterns.
In a double-slit experiment, coherent light sources create distinct and stable interference fringes.