3.5 Coherence

• Spatial coherence refers to the consistency of the wave over time.

  False
• Waves with high temporal coherence maintain a constant phase relationship over time.
• Match the type of coherence with its defining property:

  Temporal coherence ↔️ Wave consistency over time

  Spatial coherence ↔️ Wave consistency across space
• What are the key characteristics of monochromatic sources for interference experiments?

  High temporal and spatial coherence
• What type of coherence refers to the consistency of a wave across space?

  Spatial coherence
• Temporal coherence refers to the consistency of the wave over time
• Which examples demonstrate temporal coherence?

  Laser light, tuning forks
• What experiment demonstrates spatial coherence?

  Young's double-slit
• Monochromatic sources have both high temporal and spatial coherence.


  True
• Temporal coherence in monochromatic sources refers to the consistency of the wave over time.

  True
• What is coherence in waves?

  Property to interfere
• Match the type of coherence with its definition:

  Temporal coherence ↔️ Consistency of wave over time

  Spatial coherence ↔️ Consistency of wave over space
• Spatial coherence ensures that interference patterns are stable across different points in space.


  True
• Monochromatic sources emit light of a single wavelength or frequency.
• Monochromatic sources emit light of a single wavelength
• Temporal coherence is defined as the consistency of a wave over time
• Temporal coherence maintains a constant phase relationship over time.
• Why is laser light considered a highly monochromatic source?

  High temporal and spatial coherence
• What is the defining characteristic of spatial coherence?

  Consistency across space
• Match the property of coherence with its description:

  Temporal Coherence ↔️ Consistency over time

  Spatial Coherence ↔️ Consistency across space
• Waves with high temporal coherence have a constant phase relationship over time.
• What is the primary role of temporal coherence in monochromatic sources?

  Stable interference patterns
• Temporal coherence in monochromatic sources ensures consistency of the wave over time and maintains a constant phase relationship.


  True
• What is an example of a source exhibiting temporal coherence?

  Laser light
• Lasers maintain a constant phase relationship over time, which is known as temporal coherence. temporal
• Temporal coherence refers to the consistency of the wave over time. time
• Temporal coherence maintains a constant phase relationship over time. time
• Coherence is the property of waves that allows them to interfere
• Temporal coherence is the consistency of a wave over time
• What are the two types of coherence in waves?

  Spatial and temporal
• Monochromatic sources emit light of a single wavelength
• Steps in the creation of coherent laser light

  1️⃣ Light is emitted at a single wavelength

  2️⃣ Light is amplified by stimulated emission

  3️⃣ Light maintains a constant phase relationship
• Coherent superposition requires waves with a constant phase relationship and similar wavelengths
• Coherent sources maintain a constant phase relationship over time and space.
• Match the source type with its characteristics:

  Coherent Source ↔️ Constant phase relationship

  Incoherent Source ↔️ Random phase relationship
• Give an example of a source that exhibits temporal coherence.

  Tuning fork
• Match the type of coherence with its definition:

  Temporal Coherence ↔️ Consistency of wave over time

  Spatial Coherence ↔️ Consistency of wave across space
• Temporal coherence refers to the consistency of the wave over time.


  True
• Waves with high spatial coherence allow for stable interference patterns to be observed.

  True
• Laser light is an example of a highly spatially coherent source.


  True