Know that koj ua tsis tau liab. Liab yog xim thawj, yog li koj tsis tuaj yeem tsim nws los ntawm kev sib xyaw lwm yam xim. … Ib yam li liab, lwm yam xim tseem ceeb yog xiav thiab daj. Txawm hais tias koj tsis tuaj yeem ua liab dawb, koj tseem tuaj yeem ua lwm yam xim liab los ntawm kev sib xyaw liab dawb nrog lwm cov xim.
ob xim dab tsi ua liab?
Thiab ob xim dab tsi ua liab? Yog koj sib tov magenta thiab daj, koj tau liab. Tias yog vim li cas thaum koj sib tov magenta thiab daj, cov xim tshem tawm tag nrho lwm cov wavelengths ntawm lub teeb tsuas yog liab.
Dab tsi yog xiav thiab daj sib xyaw?
Cov xim daj qhia txog lub teeb feem ntau ntawm qhov ntev wavelengths thiab nqus lub teeb ntawm luv wavelengths. Vim cov xim xiav thiab xim daj ob qho tib si cuam tshuam nruab nrab (green tshwm) wavelengths thaum xiav thiab daj xim sib xyaw ua ke, qhov sib tov tshwm ntsuab.
Yuav ua li cas nrog daj kom tau liab?
Orange yog nruab nrab ntawm liab thiab daj vim txiv kab ntxwv yog tsim los ntawm kev sib tov liab nrog daj.
Dab tsi yog liab xiav thiab daj sib xyaw ua ke?
Le Blon ntxiv tias liab thiab daj ua txiv kab ntxwv; liab thiab xiav, ua ntshav; thiab xiav thiab daj ua ntsuab (Le Blon, 1725, p6).
