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عدسه احد سطحها محدب ونصف قطرة 10سم والسطح الاخر مقعر قطرة 20 سم ومعامل انكسار مادتها 1,54 احسب البعد البؤري وحدد نوعها مقعرة أم محدبه؟

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Question added by gehad ali
Date Posted: 2018/04/03
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