The Sagnac effect, also known as the Sagnac interference or Sagnac rotation, refers to the phenomenon observed in interferometry when a light beam is split into two different paths and then recombined. The effect occurs due to the rotation of a platform on which the interferometer is placed. As the platform rotates, the two beams travel different distances, leading to an interference pattern. The Sagnac effect has gained interest in several fields, including communication networks, gyroscopes, and navigation systems. Some of the common synonyms for the Sagnac effect include Sagnac rotation, Sagnac interferometer effect, and gyroscopic effect.