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Umthetho wokuthwebula i-convex lens

Kuma-optics, isithombe esakhiwe ukuhlangana kokukhanya kwangempela sibizwa ngokuthi isithombe sangempela;kungenjalo, kubizwa ngokuthi isithombe esibonakalayo.Othisha abanolwazi lwe-physics bavame ukusho indlela enjalo yokuhlukanisa lapho beveza umehluko phakathi kwesithombe sangempela nesithombe esibonakalayo: “Isithombe sangempela sibheke phansi, kuyilapho isithombe esibonakalayo siqondile.”Okubizwa ngokuthi "uqondile" futhi "ubheke phansi", Yebo kuhlobene nesithombe sokuqala.

Izinhlobo ezintathu zezithombe ezibonakalayo ezakhiwe izibuko eziyisicaba, izibuko eziconvex, namalensi aqondile zonke ziqondile;izithombe zangempela ezakhiwe izibuko ezibushelelezi namalensi ayi-convex, kanye nezithombe zangempela ezakhiwe ngesithombe sokuvula indawo, zonke zibheke phansi.Kunjalo, isibuko esiyi-concave kanye ne-convex lens nakho kungaba izithombe ezibonakalayo, futhi izithombe ezimbili ezibonakalayo ezakhiwe yizo nazo zisesimweni esiqondile.

Ngakho-ke, ingabe isithombe esakhiwe amehlo omuntu siyisithombe sangempela noma isithombe esingokoqobo?Siyazi ukuthi ukwakheka kweso lomuntu lilingana nelensi eyi-convex, ngakho isithombe esakhiwe izinto ezingaphandle ku-retina isithombe sangempela.Ngokwemithetho engenhla yesipiliyoni, isithombe esiku-retina sibonakala sibheke phansi.Kodwa yiziphi izinto esivame ukuzibona ziqonde ngokucacile?Lokhu kungqubuzana "nomthetho wesipiliyoni" empeleni kuhilela ukulungiswa kwe-cerebral cortex kanye nomthelela wesipiliyoni sempilo.

Uma ibanga eliphakathi kwento nelensi eyi-convex likhulu kunobude bokugxila belensi, into iba isithombe esihlanekezelwe.Lapho into isondela kwilensi isuka kude, isithombe siba sikhulu kancane kancane, futhi ibanga phakathi kwesithombe nelensi kancane kancane liba likhulu;lapho ibanga eliphakathi kwento nelensi Uma lincane kunobude obugxilile, into iba isithombe esikhulisiwe.Lesi sithombe akusona iphoyinti lokuhlangana lokukhanya kwangempela okufihliwe, kodwa ukuphambana kwemigqa yabo yokuhlehla yesandiso, engakwazi ukutholwa isikrini esikhanyayo.Kuyisithombe esibonakalayo.Ingaqhathaniswa nesithombe esibonakalayo esakhiwe yisibuko esiyisicaba (asikwazi ukutholwa isikrini esikhanyayo, esibonakala ngamehlo kuphela).

Uma ibanga phakathi kwento nelensi likhulu kunobude bokugxila, into iba isithombe esibheke phansi.Lesi sithombe sakhiwe ukukhanya okuvela ekhandlelani eliphumela kulensi eyi-convex ngelensi eyi-convex.Uma ibanga eliphakathi kwento nelensi lingaphansi kobude bokugxila, into iba isithombe esiqondile.


Isikhathi sokuthumela: Oct-08-2021