Umchachiso wokucakathana

Umchachiso wokucakathana ngokuvamile uhlanganisa imichachiso emibili ehlobene yomchazandalo eyasungulwa ngu -Albert Einstein : ukucakathana obukhethekile kanye nokucakathana jikelele, eyahlongozwa futhi yashicilelwa ngowe-1905 nowe-1915, ngokulandelana.  Ukucakathana okukhethekile kusebenza kuzo zonke izimongotho ezingokoqobo lapho ungekho umnyondo . Ukucakathana jikelele kuchaza umthetho womnyondo kanye nokuhlobana kwawo neziphoqi zemvelo.  Usebenza emkhakheni wendabuko kanye nokugqaya izinkanyezi, kuhlanganise nomchazamkhathi.