Zithini izibane zenkungu? Umahluko phakathi kwezibane zenkungu zangaphambili nezangasemva?
Izibane zenkungu zahlukile kwizibane ezibalekayo kwisakhiwo sangaphakathi kunye nendawo emiselweyo. Izibane zenkungu zihlala zibekwe ezantsi kwemoto, ekufutshane nendlela. Izibane zenkungu zine-Angle enqunyulweyo ye-beam phezulu kwendlu kwaye zenzelwe kuphela ukukhanyisa umhlaba phambi okanye ngasemva kwezithuthi endleleni. Enye into eqhelekileyo yilensi etyheli, ibhalbhu yesibane etyheli, okanye zombini. Abanye abaqhubi bacinga ukuba zonke izibane zenkungu zityheli, ithiyori ye-wavelength etyheli; Ukukhanya okutyheli kunobude be-wavelength obude, ngoko ke kunokungena emoyeni otyebileyo. Ingcinga yayikukuba ukukhanya okutyheli kunokudlula kwiisuntswana zenkungu, kodwa kwakungekho datha yesayensi ebonakalayo yokuvavanya le ngcinga. Izibane zenkungu zisebenza ngenxa yendawo yokuyifaka kunye ne-Angle ejolise kuyo, hayi umbala.
