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Lentile

Lentile. Chrioi Paul Cls a VII-a A. Definitie :. Lentila este un mediu transparent si omogen marginit de doua suprafete din care cel putin una este curba . Tipuri de lentile :

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Lentile

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  1. Lentile Chrioi Paul Cls a VII-a A

  2. Definitie: • Lentilaeste un mediu transparent siomogenmarginit de douasuprafete din care celputinunaestecurba. • Tipuri de lentile: • a) Lentile CONVERGENTE:-suntacelelentilemaigroase la mijlocdecat la extremitati.Eletransforma un fascicularalel in fascicul convergent. • b) LentileDivergente: -suntacelelentilemaisubtiri la mijlocsimaigroase la extremitati.Eletransforma un fasciculparalel in fascicul divergent

  3. 1) LentileConvergente

  4. 2) Lentiledivergente

  5. c) Lentilesubtiri:-suntacelelentilepentru care se neglijeazadistanta(grosimea) lorsi care se reprezintaastfel: • a) Convergente b) Divergente

  6. Elementeleuneilentile:

  7. O-Centul optic • F1 si F2 – Focare • F1-focar obiect • F2-focar imagine • F1O=OF2=f-distantafocala • Axade simetrieesteaxaopticaprincilapasitreceprincentrul optic (O)/ • Centrul optic este un punct din interiorullentilei,aflatpeaxaopticaprincipala,prin care luminatrecenedeviata

  8. Constructia de imagini in lentila • Reguli: a) O raza de lumina care se propagaparalel cu axaopticaprincipalaajunge la lentila,sereflectasitreceprinfocar(F2). • b)O raza de lumina care treceprincentrul optic ramanenedeviata.

  9. Vamultumescpentruatentiaacordata!

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