Kev sib xyaw xim yas yog ua raws li peb cov xim xim liab, daj thiab xiav, kom phim cov xim uas nrov, ua tau raws li cov xim sib txawv ntawm daim npav xim, yog kev lag luam, thiab tsis hloov xim thaum ua thiab siv.Tsis tas li ntawd, cov xim yas kuj tuaj yeem cuam tshuam vario ...
Thaum lub teeb ua rau cov khoom yas, ib feem ntawm lub teeb yog reflected los ntawm qhov chaw ntawm cov khoom los tsim cov luster, thiab lwm qhov ntawm lub teeb yog refracted thiab xa mus rau sab hauv ntawm cov yas.Thaum ntsib cov xim pigment, kev xav, refraction thiab kis tau tshwm sim ...