Ka lebaka la serapa sena se buang ka ho lekana ha boima le matla, mpolelle hore na karolo ka 'ngoe ea equation E=mc2 e emela eng.
Context:Foromo ena e hlalosa matla a E a phatsa e itseng ha e le boemong ba eona bo khutsitseng e le sehlahisoa sa boima (m) le lebelo la khanya le sekwere (c2). Hobane lebelo la leseli ke palo e khōlō ea li-unit tsa letsatsi le letsatsi (hoo e ka bang 300000 km/s kapa 186000 mi/s), foromo ena e bolela hore "boima bo phomotseng" bo fokolang, bo lekantsoeng ha tsamaiso e le boemong ba ho phomola, bo lekana le matla a maholohali, a sa itšetleheng ka hore na lintho li entsoe joang.
E ke matla, m ke boima,'me c2 ke lebelo la leseli le sekwere