Ukuphepha ilitha
Ukuphepha ukukhazimla kubangelwa ngumahluko phakathi kweendawo eziqaqambileyo nezimnyama okanye izinto. Ngokomzekelo, ukuba i-luminaire ifakwe kwigumbi, umhlali unokucinga ukuba ilitha liyingxaki. Nangona kunjalo, i
jonga iinkcukacha