The overall length of the path followed by a light ray or sound wave.
More 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.
More definitions of path lengthDefinition of path length in:
- The US English dictionary