EntityQ511755· pop 19· linked from 139 articlesladder paradoxSign in to savethought experiment in special relativityConnectionslength contractionEntityproper lengthEntityAlbert EinsteinPersonBlack holeConceptStephen HawkingPersonInternational Standard Book NumberEntityDavid HilbertEntitytheory of relativityEntityspeed of light in vacuumEntityHenri PoincaréEntitygeneral relativityEntityspecial relativityEntityHendrik LorentzEntitydigital object identifierEntitysymmetryEntityspacetimeEntityparadoxEntitySubrahmanyan ChandrasekharEntityRoger PenroseEntityMaxwell's equationsEntityCategoriesRelativistic paradoxesSpecial relativityThought experiments in physics