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Optique 3 miroir sphérique


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Posted

hellooo, dans la formule du grandissement, je ne comprends pas comment on trouve -SAI/SAo. Je ne vois pas d'ou sort le -.. si qqn veut bien m'expliquer, merciii 

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Posted

@mls Re coucou du coup dans le cours on a eu la formule : \frac{SA_{i}}{SA_{0}} = - \frac{CA_{i}}{CA_{0}} or \gamma= \frac{CA_{i}}{CA_{0}} donc on trouve bien \gamma= - \frac{SA_{i}}{SA_{0}}

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