Question

Doua lentile convergente,care intra in alcatuirea unor ochelari,cu distantele focale f1 = 50 cm , respectiv f2 = 40cm.
a) Calculeaza convergenta fiecarei lentile.
b)Care lentila are convergenta mai mare?
c)Ce defect de vedere se corecteaza in aceste lentile?

Answer 1

a) C1=1/f1=> 1/0,5=2 dioptri
     C2=1/f2=>1/0,4=2,5 dioptri
B) C2 are covergenta mai mare
c) se corecteaza hipermetropia, parezibistul