File:Ombra-punto-piano.jpg
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Italiano: L’ombra di un punto P su un piano generico alfa si determina come punto d’intersezione del raggio luminoso passante per P con il piano che riceve l’ombra alfa.
per determinare l'ombra del punto P bisogna comprendere e seguire in ordine la seguente procedura generale : 1- si fa passare per il punto P* un raggio luminoso l. 2- si fa passare per l un piano ausiliario verticale b*, 3- si detrmina la retta d'intersezione s tra i piani alfa e beta 4- in ultimo si individua il punto d'intersezione tra le rette r ed s.العربية: يتم تحديد ظل نقطة P على مستوى عام α (ألفا) كنقطة تقاطع بين شعاع الضوء المار بالنقطة P والمستوى المتلقى الظل α.
لتحديد ظل النقطة P يجب فهم واتباع الاجراءات التالية: 1 – نمرر بالنقطة P شعاع ضوئي l 2 -- نمرر بشعاع الضوء l مستوى مساعد رأسي β 3 -- نحدد خط التقاطع بين المستويات ألفا وبيتا 4 -- في النهاية نجد نقطة التقاطع P* (وهو المطلوب) بين الخطوط r و s. * |
| Date | |
| Source | Own work |
| Author | Hasanisawi |
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| current | 14:27, 30 October 2010 | | 1,019 × 685 (117 KB) | Hasanisawi (talk | contribs) | {{Information |Description={{it|1=L’ombra di un punto P su un piano generico alfa si determina come punto d’intersezione del raggio luminoso passante per P con il piano che riceve l’ombra alfa. per determinare l'ombra del punto P bisogna comprender |
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