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Objectifs des EA2 OPTIQUE GEOMETRIQUE

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Puissance <strong>des</strong> lentilles<br />

Lentille 1 Lentille 2<br />

f 1<br />

Formule <strong>des</strong> opticiens:<br />

Indice de réfraction de la lentille<br />

relatif à celui du milieu<br />

f 2 < f 1<br />

P = 1 / f<br />

[f] = m [P] = dioptrie<br />

1 / f = ( n lent /n milieu -1 )( 1/R 1 + 1/R 2 )<br />

Lentille 2<br />

plus puissante !<br />

( 1 / f = 1 / x + 1 / x’ )<br />

R 1<br />

R 2<br />

Forme de<br />

la lentille

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