@ -87,9 +87,9 @@ Sont proposées les catégories suivantes, mais à débattre :
! Observe the 3 images of the painting given by the lensball :
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! Image 1
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! Images 2 (the smallest) and 3
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! For each image of the painting, can you identify the optical system, then specify the characteristics of the various simple elements that constitute the system and their relative distances?