Definition of path length in English:

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path length

noun

Physics
The overall length of the path followed by a light ray or sound wave.
Example sentences
  • Therefore it follows that the path length corresponding to the coherence time is called the coherence length.
  • Without amplification, a single photon traveling a marathon path length doesn't make a difference.
  • The path length for the laser flash between the quartz window and the fiber was 0.5 mm.
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