A halin yanzu, fitilun zirga-zirgar sun kasance ja, kore da rawaya. Ja yana nufin tsayawa, kore yana nufin tafi, rawaya yana nufin jira (watau shirya). Amma da dadewa, akwai kawai launuka biyu: ja da kore. Yayin da manufar sake fasalin zirga-zirgar zirga-zirga ta ƙara zama cikakke, an ƙara wani launi daga baya, rawaya; Sannan kuma aka kara wani hasken ababan hawa. Bugu da ƙari, haɓakar launi yana da alaƙa da alaƙa da halayen tunanin mutane da tsarin gani.
Jikin ɗan adam yana ƙunshe da ƙwayoyin photoreceptor masu siffar sanda da nau'ikan ƙwayoyin photoreceptor iri uku. Kwayoyin photoreceptor masu siffar sanda suna da mahimmanci musamman ga hasken rawaya, yayin da nau'ikan nau'ikan nau'ikan nau'ikan hoto masu siffar mazugi guda uku suna kula da hasken ja, hasken kore da shuɗi bi da bi. Bugu da kari, tsarin gani na mutane yana sa mutane su iya bambanta tsakanin ja da kore. Ko da yake rawaya da shuɗi ba su da wahala a rarrabe su, saboda ƙwayoyin photoreceptor a cikin ƙwallon ido ba su da mahimmanci ga hasken shuɗi, ja da kore an zaɓi su azaman launukan fitila.
Dangane da saitin tushen launin hasken zirga-zirga, akwai kuma dalili mai tsauri, wato, bisa ka'idar na'urar gani ta zahiri, hasken ja yana da tsayin tsayi sosai da watsawa mai karfi, wanda ya fi sauran sigina. Saboda haka, an saita shi azaman launin siginar zirga-zirga don zirga-zirga. Dangane da amfani da kore a matsayin launin siginar zirga-zirga, saboda bambancin kore da ja yana da girma kuma yana da sauƙin rarrabewa, kuma ƙimar makafin launi na waɗannan launuka biyu ba su da yawa.
Bugu da kari, akwai wasu dalilai bayan wadannan dalilai na sama. Saboda launi kanta yana da ma'anar alama, ma'anar kowane launi yana da halaye na kansa. Misali, ja yana ba mutane sha'awar sha'awa ko jin zafi, sannan rawaya ya biyo baya. Yana sa mutane su yi taka tsantsan. Saboda haka, ana iya saita shi azaman launin ja da rawaya hasken zirga-zirga masu ma'anar hana zirga-zirga da haɗari. Koren yana nufin m da shiru.
Kuma kore yana da wani tasiri mai rage gajiyar ido. Idan kana karanta littattafai ko kunna kwamfuta na dogon lokaci, idanuwanka za su ji gajiya ko kaɗan. A wannan lokacin, idan kun juya idanunku zuwa ga tsire-tsire masu kore ko abubuwa, idanunku za su sami jin dadi na bazata. Saboda haka, ya dace a yi amfani da kore azaman launin siginar zirga-zirga tare da mahimmancin zirga-zirga.
Kamar yadda aka ambata a sama, ainihin launin siginar zirga-zirga ba a saita shi ba bisa ka'ida ba, kuma akwai takamaiman dalili. Don haka, mutane suna amfani da ja (mai wakiltar haɗari), rawaya (mai wakiltar faɗakarwa da wuri) da kore (wakiltan aminci) azaman launukan siginar zirga-zirga. Yanzu kuma yana ci gaba da amfani da kuma motsawa zuwa mafi kyawun tsarin odar zirga-zirga.
Lokacin aikawa: Agusta-16-2022
