Ukukhanya kungachazwa ngezindlela eziningi.
I-photon, i-wave form, i-particle, i-electromagnetic frequency. Ukukhanya kusebenza njengezinhlayiyana ezibonakalayo kanye namagagasi.
Esikucabanga njengokukhanya yingxenye encane ye-electromagnetic spectrum eyaziwa ngokuthi ukukhanya okubonakalayo komuntu, amangqamuzana asemehlweni omuntu azwelayo kukho. Amehlo amaningi ezilwane azwela uhla olufanayo.
Izinambuzane, izinyoni, ngisho namakati nezinja ziyakwazi ukubona izinga elithile lokukhanya kwe-UV, kuyilapho ezinye izilwane zibona infrared; izinhlanzi, izinyoka, ngisho nomiyane!
Ubuchopho bezilwane ezincelisayo buhumusha/buhlukanisa ukukhanya kube 'umbala'. Ubude begagasi noma imvamisa yokukhanya yikhona okunquma umbala esicatshangwayo. Ubude be-waveleng ende bubukeka bubomvu kuyilapho ubude begagasi obufushane bubonakala buluhlaza okwesibhakabhaka.
Ngakho umbala awuyona into engaphakathi endaweni yonke, kodwa uyindalo yezingqondo zethu. Imelela ingxenye encane kuphela ye-spectrum ye-electromagnetic ephelele. I-photon nje ngemvamisa ethile.
Uhlobo oluyisisekelo lokukhanya umfudlana wama-photon, ozungezayo ngobude obuthile begagasi.