تصحيح امتحان الكفاءة المهنية لتحضير المختبرات المدرسية 2017

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السؤال 7 الجواب ج "تصحيح"

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Ih ssafi chukran lik ✌️✌️

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n1sin(i) =n2sin(r)------->>> n1/n2=sin(r) /sin(i) ---------->>>
Et Ona r>>>I donc sin(r) >>sin(I)
Sin(r) /sin(i) >>>1---------->>>n1/n2>>>1 donc n1>n2