x = 15 cm =
Z = 10 D = 10 1/m
Z = 1/f
f = 1/Z
f = 1/10 m = 10 cm
h1 = 2 cm
y= ?
h2 = ?
równanie soczewki:
1/f = 1/x+1/y
1/f - 1/x = 1/y
1/y = 1/f - 1/x
1/y = 1/10 - 1/15 ; wspólny mianownik: 30
1/y = 3/30 - 2/30
1/y = 1/30
y = 30 cm
p = y/x
p = h2/h1
y/x = h2/h1
30/15 = h2/2
h2 = 4