Rotary photon drag at the earth’s rotation rate in a Sagnac interferometer Sana Ullah, Arif Ullah, M. Imtiaz Khan, Ashfaq Ahmad and Imran Khan Eur. Phys. J. Plus, 140 3 (2025) 218 Published online: 14 March 2025 DOI: 10.1140/epjp/s13360-025-06173-8