Affa

Affa (s Tegnizt : Radiance ) d tasmekta n tfasa n tafat i d-iteffɣen deg yiwet n tsint seg 1 cm 2 seg kra n tjumma iteddun ɣer kra n tnila s talɣa taratakt i teɣmert tuntimt . [ 1 ] Tigget n waffa deg unagraw agreɣlan n tiggtin iga d watt i yal amiter amkuẓ i yal ustirdyan (W·sr −1 ·m −2 ), anda tajumma (m³) tettili d taratakt deg tnila n tafat

Asegder n tafat deg yilem yeṭṭafar tadɣert d tnila. Amedya, Tasfawt (llamba) i d-iberrun i tadla n tafat deg texxamt tamsullest mi ara ad yettwassen wadeg n tesfawt d tnila deg wacu i d-ittak tafat yettak-d tazmert i weglam n tesfawt. Anecta yennumk d akken kra n tajumma meẓẓiyen iwulan ɣer uɣbalu n tafat seg zdat tetteɣlay-d fellas tfasa meqqren s wassaɣ ɣer tjumma ur nwula ara srid i tafat

Seg tsekna tixatarin yakk n waffa d akken iga d imezgi n watig deg uzerrig aɣɣad, dɣa taskent-a tettusemres s tuget deg yisnasen tsekdanin . S yis yezmer ad tili tussna n tassast n usefliley n tfukt d yitran . Asumer n tafat d akken-it ur tettwasemdu ara s wammas deg wanda i d-tettenfufud deg-s yettili d imezgi gar n sin n wazagen P 1 d P 2 , atig n waffa yettaǧǧan azag P 1 deg tnila n P 2 yegda atig n waffa i d-ittawaṭen ɣef wazag P 2 seg tnila P 1 .

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