Tsab xov xwm hais txog Cov Khoom ntawm daim duab uas tsim los ntawm daim iav concave
Qhov deb ntawm yam khoom me dua li qhov ntev ntawm lub iav concave (do < f)
Raws li kev xam ntawm daim duab tsim los ntawm daim iav concave, nws xaus lus tias yog tias qhov deb ntawm yam khoom (do) me dua qhov ntev focal (f), ces cov khoom ntawm daim duab yog:
- Virtual txhais tau tias lub teeb tsis hla dhau daim duab
- Ntsug
- Qhov deb ntawm daim iav concave yog qhov deb npaum li cas, qhov loj ntawm daim duab yuav loj dua.
- Qhov deb ntawm daim iav concave, qhov deb ntawm daim duab ntawm daim iav concave
Cov khoom nyob ntawm qhov chaw tseem ceeb ntawm daim iav concave (do = f)
Raws li kev xam ntawm cov duab tsim los ntawm daim iav concave, nws xaus lus tias yog tias cov khoom nyob ntawm qhov chaw tseem ceeb ntawm daim iav concave, cov khoom ntawm daim duab yog:
- Virtual txhais tau tias lub teeb tsis hla dhau daim duab
- Ntsug
– Daim duab nyob ntawm qhov deb kawg
Cov khoom nyob nruab nrab ntawm qhov chaw tseem ceeb thiab qhov chaw nruab nrab ntawm qhov nkhaus (f < do
Raws li kev xam ntawm cov duab tsim los ntawm daim iav concave, nws tau xaus lus tias yog tias cov khoom nyob nruab nrab ntawm qhov chaw tsom mus rau thiab lub vojvoog ntawm daim iav curvature, cov khoom ntawm daim duab yog:
- Tiag tiag txhais tau tias lub teeb ci ntsa iab hla dhau daim duab
- Tig rov qab
– Qhov deb ntawm daim iav concave ntawm qhov khoom, qhov loj ntawm daim duab yuav me dua.
- Qhov deb ntawm daim iav concave, qhov ze ntawm daim duab los ntawm daim iav concave
Cov khoom nyob rau hauv qhov chaw ntawm curvature (do = R)
Raws li kev xam ntawm cov duab tsim los ntawm daim iav concave, nws tau xaus lus tias yog tias cov khoom nyob rau ntawm qhov chaw nruab nrab ntawm qhov nkhaus ntawm daim iav concave, cov khoom ntawm cov duab yog:
- Tiag tiag txhais tau tias lub teeb ci ntsa iab hla dhau daim duab
- Tig rov qab
- Qhov loj ntawm daim duab = qhov loj ntawm yam khoom
- Qhov deb ntawm daim duab = qhov deb ntawm yam khoom
Qhov deb ntawm yam khoom loj dua li lub vojvoog ntawm qhov nkhaus ntawm daim iav concave (do > R)
Raws li kev xam ntawm cov duab tsim los ntawm daim iav concave, nws xaus lus tias yog tias qhov deb ntawm cov khoom loj dua lub vojvoog ntawm qhov nkhaus ntawm daim iav, cov khoom ntawm daim duab yog:
- Tiag tiag txhais tau tias lub teeb ci ntsa iab hla dhau daim duab
- Tig rov qab
– Qhov deb ntawm daim iav concave ntawm qhov khoom, qhov loj ntawm daim duab yuav me dua.
- Qhov deb ntawm daim iav concave, qhov ze ntawm daim duab ntawm daim iav concave
- Thaum lub khoom raug tso rau ntawm infinity, daim duab uas tsim los ntawm daim iav concave yog dab tsi?
Daim duab yog tiag tiag, tig rov qab, thiab txo qis heev. Nws yog tsim los ntawm qhov tsom ntawm daim iav concave.
- Piav qhia txog cov yam ntxwv ntawm daim duab uas tsim los ntawm daim iav concave thaum muab cov khoom tso rau dhau qhov chaw nruab nrab ntawm qhov nkhaus.
Daim duab uas tsim los yog tiag tiag, tig rov qab, thiab txo qis. Nws yog tsim los ntawm qhov chaw tsom mus rau qhov chaw thiab qhov chaw nruab nrab ntawm qhov nkhaus.
- Thaum muab cov khoom tso rau hauv nruab nrab ntawm qhov nkhaus, daim duab uas tsim los ntawm daim iav concave yuav ua li cas?
Thaum lub khoom nyob hauv nruab nrab ntawm qhov nkhaus, daim duab yog tiag tiag, tig rov qab thiab loj ib yam li lub khoom. Daim duab kuj tseem tsim nyob rau hauv nruab nrab ntawm qhov nkhaus.
- Cov yam ntxwv ntawm daim duab uas tsim thaum lub khoom raug muab tso rau ntawm qhov chaw nruab nrab ntawm qhov nkhaus thiab qhov tsom mus rau hauv daim iav concave yog dab tsi?
Hauv qhov no, daim duab yog tiag tiag, tig rov qab thiab loj dua. Nws yog tsim dhau ntawm qhov chaw nruab nrab ntawm qhov nkhaus.
- Thaum muab cov khoom tso rau ntawm qhov tsom ntawm daim iav concave, daim duab ntawd zoo li cas?
Daim duab no yog tsim los ntawm infinity thiab nws yog tiag tiag, tig rov qab, thiab loj heev.
- Daim duab uas tsim los ntawm daim iav concave hloov pauv li cas thaum muab cov khoom tso rau ntawm tus ncej thiab qhov tsom?
Thaum muab ib yam khoom tso rau nruab nrab ntawm tus ncej thiab qhov tsom ntawm daim iav concave, daim duab uas tsim los yuav yog virtual, erect, thiab magnified. Daim duab ntawd tsim tom qab daim iav.
- Thaum muab qhov khoom tso rau ntawm qhov tsom ntawm daim iav concave, qhov loj ntawm daim duab piv rau qhov loj ntawm cov khoom li cas?
Thaum muab cov khoom tso rau ntawm qhov tsom kwm, qhov loj ntawm daim duab loj heev piv rau qhov loj ntawm cov khoom, vim tias daim duab raug tsim thaum tsis kawg.
- Daim iav concave puas tuaj yeem tsim tau ob qho tib si cov duab tiag tiag thiab cov duab virtual? Piav qhia yog vim li cas.
Yog, daim iav concave tuaj yeem tsim cov duab tiag tiag thiab cov duab virtual. Thaum cov khoom raug muab tso rau ntawm tus ncej thiab qhov tsom, cov duab tsim yog virtual, erect, thiab magnified. Rau txhua qhov chaw ntawm cov khoom, cov duab yog tiag tiag thiab inverted.
- Daim iav sib npaug li cas rau cov khoom ntawm cov duab uas tsim los ntawm daim iav concave?
Tus qauv ntawm daim iav 1/f = 1/v + 1/u cuam tshuam qhov deb ntawm yam khoom (u), qhov deb ntawm daim duab (v), thiab qhov ntev ntawm lub lens (f). Tus qauv no pab kwv yees qhov chaw, yam ntxwv, thiab qhov loj ntawm daim duab. Hauv qhov no, daim iav concave muaj qhov ntev ntawm lub lens tsis zoo, yam khoom tiag tiag muaj qhov deb ntawm yam khoom tsis zoo, thiab daim duab tiag tiag muaj qhov deb ntawm daim duab tsis zoo.
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Qhov tseem ceeb ntawm qhov magnification hauv cov ntsiab lus ntawm daim duab tsim los ntawm daim iav concave yog dab tsi?
Kev loj (m) yog txhais tias yog qhov sib piv ntawm qhov siab ntawm daim duab (h₂) rau qhov siab ntawm yam khoom (h₁), piv txwv li, m = -v/u = h₂/h₁. Lub cim tsis zoo qhia tias daim duab tig rov qab. Yog tias |m| > 1, daim duab raug loj dua; yog tias |m| = 1, daim duab muaj tib qhov loj li yam khoom; thiab yog tias |m| < 1, daim duab raug txo qis.
