Akdu uɣmir

Akdu uɣmir i kra n tfekka d akdu imeẓri n tfekka seg kra n wadeg yettwakten d tiɣmert. Akdu uɣmir yettusemres deg tesnallunt i wakken ad imel akat n tfekkiwin deg tallunt

Tiftarin tusnakin

Asiden n ukdu uɣmir n kra n talɣa d ayen izemren ad yili s usemres n wassaɣ:

$\delta =2\arctan \left({\frac {1}{2}}\,d/D\right),$

Anda $\delta$ ukdu uɣmir $d$ d $D$ d akdu imeẓri d westum ɣef tfekka yettwaktan s yiwet n tigget ya mi ara ad yili $D$ yugar s waṭas $d$, d ayen izemren ad yili usades n watig $\delta$ s wassaɣ $\delta =d/D$ anda atig n tiɣmert tettwaket s uradyan.

I lment n tfekkiwin timezzayin ilan (yesɛan) akdu-ines imdetti yegda $d_{\mbox{act}}$ akdu uɣmir yettwafk-d s wassaɣ:

$\delta =2\arcsin \left({\frac {1}{2}}\,d_{\mbox{act}}/D\right).$