Ukukhanya kungachazwa ngezindlela eziningi.
I-photon, isimo segagasi, inhlayiya, imvamisa kagesi. Ukukhanya kusebenza njengenhlayiya ebonakalayo kanye negagasi.
Lokho esikucabanga njengokukhanya kuyingxenye encane ye-electromagnetic spectrum eyaziwa ngokuthi ukukhanya okubonakalayo komuntu, okuyinto amangqamuzana asemahlweni abantu azwela kuyo. Amehlo ezilwane eziningi azwela ububanzi obufanayo.
Izinambuzane, izinyoni, ngisho namakati nezinja zingabona izinga elithile lokukhanya kwe-UV, kanti ezinye izilwane zingabona i-infrared; izinhlanzi, izinyoka, ngisho nomiyane!
Ubuchopho bezilwane ezincelisayo buhumusha/buchaza ukukhanya kube 'umbala'. Ubude be-wavelength noma imvamisa yokukhanya yikho okunquma umbala esiwubonayo. Ubude be-wavelength obude bubukeka njengobomvu kuyilapho ubude be-wavelength obufushane bubonakala buluhlaza okwesibhakabhaka.
Ngakho umbala awuyona into engaphakathi endaweni yonke, kodwa uyisidalwa sezingqondo zethu. Umelela ingxenye encane kuphela ye-full electromagnetic spectrum. I-photon nje ngemvamisa ethile.
Uhlobo oluyisisekelo lokukhanya luwumfudlana wama-photon, ajikeleza kubude be-wavelength ethile.