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Secondary V • 1yr.

Rebonjour,

Je ne comprends pas mon erreur, la réponse est supposé être 3m.

Merci encore

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Physique
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Explanations (1)

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    1yr.

    La question est un peu piège parce qu'ils veulent la distance disque-écran et non celle Source lumineuse - écran.

    Donc c'est 4m - 1m = 3m

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