Difference between revisions of "Coherent"
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==Key Stage 5== | ==Key Stage 5== | ||
===Meaning=== | ===Meaning=== | ||
| − | Two sources of waves are [[coherent]] if they emit | + | Two sources of waves are [[coherent]] if they [[emit]] [[wave]]s with a constant [[Phase Difference|phase difference]]. |
===About Coherence=== | ===About Coherence=== | ||
| − | *Coherent sources produce | + | *'''Coherent''' sources produce [[wave]]s that are in sync, having a constant [[phase]] relationship. |
| − | + | *'''Coherence is necessary for producing clear [[Interference Pattern|interference patterns]]. | |
| − | + | *'''Coherent''' [[Visible Light|visible light]] are typically [[monochromatic]] and have the same [[frequency]]. | |
| − | + | *'''Coherence''' is essential in applications like [[laser]]s, holography, and [[interferometry]]. | |
| − | Coherent | + | *'''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 Fringe|interference fringes]]. | |
| − | + | *Achieving '''coherence''' often involves stabilizing the [[frequency]] and [[phase]] of the [[wave]] sources. | |
| − | |||
| − | 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=== | ===Examples=== | ||
| + | *[[Laser]] light is '''coherent''' and can produce clear [[Interference Pattern|interference]] and [[Diffraction Pattern|diffraction patterns]]. | ||
| − | + | *In a [[Double Slit Experiment|double-slit experiment]], '''coherent''' light sources create distinct and stable [[Interference Fringe|interference fringes]]. | |
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| − | In a double-slit experiment, coherent light sources create distinct and stable interference fringes. | ||
Latest revision as of 11:13, 23 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.
- Coherence is necessary for producing clear interference patterns.
- Coherent visible light are typically monochromatic and have the same frequency.
- Coherence is 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.