Sonke siyazi ukuba kukho imibala eyahlukileyo ngokwamaqela ahlukeneyo. Ukukhanya yi-electromagnetic wave, ngokobude bayo, obunokwahlulwa kukukhanya kwe-ultraviolet (1nm-400nm), ukukhanya okubonakalayo (400nm-700nm), ukukhanya okuluhlaza (490 ~ 560nm), ukukhanya okubomvu (620 ~ 780nm) kunye nokukhanya kwe-infrared (700nm a...
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