Interferometry is the use of light waves, sound, etc., to identify changes in matter or motion. New research uses entangled photons and fiber optics to measure Earth’s nanorotations. In a paper ...

Seismic activity plays a crucial role in understanding Earth's geological processes, from monitoring natural hazards to ...

White-light interferometry is one of today’s most precise tools for determining the properties of optical materials. Its achievable precision and accuracy are typically limited by systematic ...