Kungani ilanga likhanya kakhulu ezindaweni eziphakeme
Context:Inani lamandla okushisa atholakele kunoma iyiphi indawo emhlabeni liwumphumela oqondile we-angle yeLanga esimweni sezulu, njengoba i-angle lapho ukukhanya kwelanga kuhlasela khona uMhlaba kuyahlukahluka ngokwendawo, isikhathi sosuku, kanye nesikhathi sonyaka ngenxa yomjikelezo woMhlaba ozungeze iLanga nokujikeleza koMhlaba kuzungeze i-eksisi yawo ethambekele. Ukushintsha kwezikhathi zonyaka kwe-engela yokukhanya kwelanga, okubangelwa ukuthambekela kwe-eksisi yoMhlaba, kuyindlela eyisisekelo eholela esimweni sezulu esifudumele ehlobo kunasebusika. Ukushintsha kobude bosuku kungenye into.  Iveza icala lapho ukukhanya kwelanga kukhanya eMhlabeni nge-angle ephansi (iLanga liseduze ne-horizon), amandla okukhanya kwelanga asakazeka endaweni enkulu, ngakho-ke abuthakathaka kunalapho iLanga liphakeme ngaphezulu futhi amandla agxile endaweni encane.
Kuyaziwa ukuthi ilanga liba namandla kakhulu ezindaweni eziphakeme. Nokho, ngokuphambene nenkolelo evamile, ilanga aliqhakazi kakhulu ngenxa yokuba seduze nelanga, kodwa ngenxa ye-angle of incidence yelanga. I-angle yokwehla iphakeme kakhulu, ngakho-ke amandla emisebe yelanga agxila endaweni encane. Lokhu kwenza amandla elanga abe namandla ngokwengeziwe