Title: The Sagnac effect and its interpretation by Paul Langevin Subject: Comptes Rendus Physique, 18 (2017) 563­569. 10.1016/j.crhy.2017.10.010 Author: Gianni Pascoli Creator: Elsevier Producer: Acrobat Distiller 9.5.5 (Windows) CreationDate: Wed Dec 6 12:14:12 2017 ModDate: Wed Dec 6 12:14:12 2017 Tagged: yes Form: none Pages: 7 Encrypted: no Page size: 544.252 x 742.677 pts (rotated 0 degrees) File size: 483181 bytes Optimized: no PDF version: 1.7