Optical Properties Ntawm Cov Iav Puag

- Apr 12, 2019-

Lub iav ua raws txoj cai ntawm kev xav rau lub hauv paus ntawm lub teeb. Nws muaj peev xwm ua kom pom tseeb nyob ntawm lub kaum sab xis ntawm qhov teeb meem, qhov sib luag ntawm daim iav, thiab qhov xwm txheej ntawm cov hlau yog plated. Lub tswv yim fab xav hauv kab rau hauv daim iav nplaum yog hu ua qhov kab, thiab lub kaum sab xis ntawm qhov xwm txheej thiab qhov nruab nrab ntawm txoj kab thiab cov kab zoo sib npaug. Tus kwv nyob rau hauv pem hauv ntej ntawm dav hlau daim iav yog ib qho duab qub duab tom qab daim iav, qhov deb ntawm iav saum npoo yog sib npaug ntawm qhov deb ntawm qhov khoom thiab iav saum npoo. Yog tias koj xav pom tag nrho ntawm tus neeg ntawm daim iav, txij li lub kaum sab xis ntawm qhov xwm txheej sib npaug ntawm lub kaum ntse ntse, nws yuav tsum muaj tsawg kawg yog ib nrab ntawm nws lub cev ntev. Lub ntsej muag tshiab ntawm lub iav concave ntsej muag qhov chaw ntawm curvature. Cov duab tshav ntuj yog ib qho teeb meem ntawm qhov iav qhov siv thiab ua kom pom tseeb (f) ntawm txoj haujlwm 1/2 ntawm txoj kab nruab nrab ntawm qhov nruab nrab ntawm qhov chaw nkag (c) thiab daim iav. Yog tias lub cooker tso rau ntawm qhov chaw focal ntawm lub iav loj loj, nws muaj peev xwm ua kom sov los ntawm tshav ntuj kom dhau los ua lub hnub ci cooker. Yog tias lub teeb nyob rau hauv lub teeb lossis lub teeb ci tsau rau ntawm qhov chaw ntawm lub iav qhov tseeb, lub teeb yuav pom tau ntawm lub teeb pom kev zoo. Thaum cov khoom tawm sab nraud qhov chaw ntawm curvature, nws muaj peev xwm yuav tsum tau xav txog raws li ib daim duab tiag tiag, xws li lub tsom iav. Lub nplaum ntim ntawm lub iav convex ntsej muag tawm ntawm qhov chaw ntawm curvature, thiab cov ntaub ntawv tsim cov duab qis dua tom qab daim iav, uas tuaj yeem muaj kev cuam tshuam ntau yam kev ua haujlwm luv luv, xws li tsheb rear qhov tsom iav.