Vim li cas thiaj tuaj yeem' tsis yog koj xaiv lub teeb pom kev qis qis
Illumination yog ib qho tseem ceeb heev thaum xaiv blackboard teeb. Peb yuav tsum xav txog qhov xwm txheej tshwj xeeb ntawm lub teeb pom kev ntawm chav kawm blackboard layout ib feem. Yog tias nws qis dua tus nqi tus qauv, ces qhov muag yuav qhib rau qhov siab tshaj plaws, thiab txhawm rau kom muaj lub teeb txaus, tus menyuam kawm ntawv' lub taub hau yuav qis dua, uas ua rau kev ncua deb. , qhov kev ncua deb ntawm cov phau ntawv yog nyob ze.
Vim li no, thaum xaiv ib lub teeb blackboard, koj yuav tsum xav txog qhov illuminance. Thaum lub teeb pom kev tsawg dhau lawm, nws yooj yim ua rau lawv nyeem los ze zog, thiab qhov deb thaum sau ntawv yog ze, thiab lawv ob lub qhov muag ze heev. Nws yog ib qho yooj yim kom nkees thiab myopia yog ib qho yooj yim tsim rau lub sij hawm ntev. Yog li peb yuav tsum xav txog qhov ci ntsa iab ntawm tag nrho cov chav kawm ib puag ncig hauv cov txheej txheem xaiv, kom nws tuaj yeem tiv thaiv qhov tshwm sim ntawm myopia.
Muaj ntau lub npe ntawm lub teeb blackboard nyob rau hauv kev ua lag luam. Koj yuav tsum tau them sai sai rau cov xwm txheej tshwj xeeb ntawm cov hom no hauv cov txheej txheem xaiv, thiab qhov yooj yim ntawm cov khoom. Hais txog teeb pom kev zoo, qhov loj ntawm tag nrho cov chav kawm yuav tsum tau muab rau hauv kev txiav txim siab. Rau qhov yuav tsum tau muaj nyob rau hauv peb cov txheej txheem siv tshwj xeeb, cia cov neeg ua haujlwm tshaj lij ua cov qauv tsim thiab kev teeb tsa, kom lub qhov muag ntawm cov tub ntxhais kawm tuaj yeem tiv thaiv tau zoo, thiab nws tseem yuav muaj kev pab ntau rau kev tiv thaiv myopia.
Los ntawm cov saum toj no, kev xaiv ntawm blackboard teeb tsis yog ib qho random ntau. Peb yuav tsum pib los ntawm qhov kev xav ntawm kev tshaj lij thiab muaj tus cwj pwm tshaj lij. Rau lub hauv paus no, peb tuaj yeem xaiv lub teeb pom kev zoo dua kom peb tuaj yeem tsis ua rau qee qhov kev puas tsuaj rau lub qhov muag thaum siv, uas yog qhov zoo dua rau peb cov ntawv thov yav tom ntej.
