Lub Lens twg yog siv nyob rau hauv Tsheb Sab Daim iav?
Lub tsheb sab iav ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev nyab xeeb ntawm txoj kev. Lawv tso cai rau cov neeg tsav tsheb pom tias muaj dab tsi tshwm sim nyob ib puag ncig lawv, tshwj xeeb tshaj yog thaum hloov txoj kab lossis tig. Qhov zoo ntawm daim iav sab tuaj yeem ua rau txhua qhov sib txawv ntawm kev tiv thaiv kev sib tsoo thiab ua kom muaj kev tsav tsheb zoo.
Yog li, lub lens twg yog siv rau hauv tsheb sab iav? Feem ntau, cov lus teb yog convex lo ntsiab muag. Cov lo ntsiab muag no yog nkhaus sab nraud, uas ua rau pom qhov dav dav. Lawv tso cai rau cov neeg tsav tsheb pom thaj tsam ntau dua ntawm txoj kev tom qab lawv, uas yog qhov tseem ceeb tshwj xeeb tshaj yog thaum thaub qab lossis hloov txoj kab. Convex lo ntsiab muag tseem ua kom pom cov khoom hauv daim iav, ua rau lawv pom ze dua li qhov tiag tiag.
Kev siv cov lo ntsiab muag convex nyob rau hauv daim iav sab tau dhau los ua qauv hauv ntau lub tsheb. Lawv yog cov pheej yig, ruaj, thiab txhim khu kev qha. Lawv kuj tseem yooj yim rau nruab thiab hloov yog tias tsim nyog. Qhov no yog ib qho tseem ceeb vim hais tias cov iav sab hauv tsheb muaj kev puas tsuaj los ntawm kev sib tsoo lossis huab cua.
Ib yam uas yuav tsum nco ntsoov txog cov lo ntsiab muag convex yog tias lawv tsim cov duab distorted. Cov khoom nyob rau hauv daim iav yuav tshwm me me los yog nyob deb dua li lawv tiag tiag. Qhov no yog vim qhov curvature ntawm lub lens. Txawm li cas los xij, feem ntau cov neeg tsav tsheb tau nkag mus rau qhov kev hloov pauv no thiab tuaj yeem them nyiaj rau nws thaum tsav tsheb.
Hauv kev xaus, kev siv cov lo ntsiab muag convex hauv tsheb sab iav yog qhov kev xaiv ntse rau kev txhim kho kev nyab xeeb. Lawv muab kev pom dav dav thiab nthuav cov khoom hauv daim iav, ua kom yooj yim rau cov neeg tsav tsheb pom tias muaj dab tsi tshwm sim tom qab lawv. Thaum lawv tuaj yeem tsim cov duab tsis zoo, cov neeg tsav tsheb tuaj yeem kho qhov no thiab siv lawv cov iav kom zoo.