Source: wikibot/einstein-hopf-drag
= Einstein–Hopf drag
{wiki=Einstein–Hopf_drag}
Einstein–Hopf drag, also known simply as "Hopf drag," refers to a phenomenon in theoretical physics that arises in the context of general relativity and the motion of rotating masses. The term is often associated with the effects that a rotating mass has on the inertial frames of reference around it, particularly in relation to the way the rotation influences the motion of nearby objects.