Tolong dong kak lagi butuh jangan lupa caranya juga​

Jawaban:

P = 25 dioptri

Penjelasan:

1/f = 1/S + 1/S'

1/f = 1/12 + 1/6

1/f = 1/12 + 2/12

1/f = 3/12

f = 12/3= 4 cm

Kekuatan Lensa :

P = 100/f = 100/4 = 25 dioptri