Modélisation et tracé

La lunette astronomique - Physique-Chimie Spécialité

Exercice 1 : Tracer l'image d'un objet par une lentille convergente

Tracer les 3 rayons remarquables issus de \( B \).
Tracer ensuite l'image de l'objet \( AB \), qu'on symbolisera par un segment.

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Exercice 2 : Tracer les rayons remarquables d'un objet situé sur le plan focal d'une lentille convergente

Tracer les 2 rayons remarquables issus de B.

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Exercice 3 : Calculer la taille d'une image par son grandissement

Un arbre de \(7,6 m\) de haut est situé à \(10,5 m\) de la lentille d'un appareil photographique. Le capteur est situé à \(4,8 cm\) de la lentille.

Quelle est la taille de l'image dans ces conditions de photographie ?
On donnera un résultat avec 2 chiffres significatifs et suivi de l'unité qui convient.

Exercice 4 : Compléter le tracer d'un rayon lumineux quelconque

Compléter le schéma suivant en indiquant la marche du rayon lumineux émergent de la lentille convergente.

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Exercice 5 : Tracer les rayons remarquables d'un objet situé à l'infini

Compléter le chemin des rayons lumineux issus de \( B \) situé à l'infini.
Tracer ensuite l'image de l'objet \( AB \), qu'on symbolisera par un segment.

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