Kamar yadda kowa ya sani, tsawon zangon bakan haske da ake iya gani shine 380nm ~ 760nm, wanda shine launuka bakwai na haske waɗanda idanuwan ɗan adam ke iya ji - ja, orange, yellow, green, green, blue da purple. Koyaya, launuka bakwai na haske duk monochromatic ne. Misali, kololuwar igiyar ruwa...
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