Rau qhov khoom ntawm infinity, daim iav concave tsim cov duab ntawm nws qhov kev tsom xam uas yog tiag tiag, thim rov qab thiab ploj zuj zus. … Li no cov duab tsim ntawm tsom xam raws li qhov loj me. Raws li ib daim duab yog tsim vim converging rays nyob rau hauv pem hauv ntej ntawm cov sib tov, yog li ntawd nws yog cov duab tiag tiag. Li no cov duab tsim yog tiag tiag, inverted thiab diminished.
Thaum ib qho khoom nyob ntawm qhov tsis muaj qhov kawg ntawm daim iav concave dab tsi yuav yog txoj haujlwm ntawm daim duab?
Thaum ib yam khoom nyob rau hauv infinity, ces cov rays los ntawm nws yuav luag sib npaug mus rau lub hauv paus axis. Li no daim duab tsim yog at focus.
Thaum qhov khoom nyob ntawm infinity hauv concave lens?
Object yog nyob rau hauv infinity:
Ib lub ntsiab lus tsawg zuj zus, cov duab virtual thiab erect yog tsim thaum cov khoom nyob rau hauv infinity los ntawm lub lens concave ntawm lub ntsiab tseem ceeb F1. Cov Khoom Ntawm Cov Duab: Duab yog qhov taw qhia qhov loj me, txo qis heev, virtual thiab erect.
Puas yog daim iav concave tiag los yog virtual?
Cov iav tsom iav tuaj yeem tsim cov duab tiag thiab virtual nyob ntawm qhov deb ntawm daim iav mus rau qhov khoom thiab qhov nkhaus ntawm daim iav, thaum daim iav convex tsim cov duab virtual xwb.
C hauv daim iav concave yog dab tsi?
Lub focal point (F) ntawm daim iav concave yog qhov taw tes uas lub teeb sib luag ntawm lub teeb yog "focussed" tom qab xav txog hauv daim iav. … Lub centre ntawm curvature (C) yog qhov nruab nrab ntawm lub voj voog (sphere) uas daim iav yog ib qhoarc.
