Answer: relativity

AnswerCrossword Clue
RELATIVITYSubject of 15 Across's third 1905 article
RELATIVITYScientific theory formulated in 1905.
RELATIVITYHistoric theory in physics.
RELATIVITYFamous theory.
RELATIVITYTheory in physics.
RELATIVITYConcern of the physicists.
RELATIVITYTheory of 1905.
RELATIVITYEinstein's famous theory
relativityThe dependence of various physical phenomena on relative motion of the observer and the observed objects, esp. regarding the nature and behavior of light, space, time, and gravity
relativityThe absence of standards of absolute and universal application
relativitythe state of being relative