Funga nezvevatariri vaviri vari muchikepe chinomhanyisa. Muchikepe chakadai, pane pfungwa yechisikigo ye "kumusoro" uye "pasi": nzira iyo chikepe chinomhanyisa iri "kumusoro", uye zvinhu zvisina kubatana zvinomhanyisa munzira yakatarisana, ichidonha "pasi". Fungidzira kuti mumwe wevatariri ari "kumusoro" kupfuura mumwe. Kana mutariri wepasi achitumira chiratidzo chechiedza kumutariri wepamusoro, kumhanyisa kunokonzeresa kuti mwenje ushandiswe kutsvuku, sezvinogona kuverengerwa kubva kune yakasarudzika relativity; wechipiri anoona achave neyakaderera frequency yechiedza kupfuura yekutanga. Zvakare, mwenje kubva kumutariri wepamusoro kuenda kune yakaderera bhuruu, ndiko kuti, inoshandurwa yakananga kune yakakwira mafambiro. Einstein akataura kuti mafambiro akadaro anofanirwawo kuongororwa nenzira yekukwira kumusoro. Mubvunzo uyu unoratidzwa naEinstein sezvaunogona kuongororwa mumufananidzo uri pazasi, sezvo kuyerera kwechiedza kunogona kuongororwa zvishoma nezvishoma kurudyi.
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