EntityQ7075491· pop 5· linked from 20 articlesObserverSign in to saveframe of reference in special relativityConnectionsAlbert EinsteinPersoninertial frame of referenceEntityMax PlanckEntityquantum mechanicsEntityInternational Standard Book NumberEntitytheory of relativityEntityspeed of light in vacuumEntityHenri PoincaréEntityspecial relativityEntitygeneral relativityEntityPaul DiracEntityMax BornEntityHendrik LorentzEntityAlbert A. MichelsonEntityspacetimeEntityMax von LaueEntitykinematicsEntityMaxwell's equationsEntitydynamicsEntitymass–energy equivalenceEntityCategoriesSpecial relativity