Diketahui: f = 12 cm ; M = 2 kali
Ditanyakan : s....?
Jawab :
M = l s’/s l
2 = s’/s
s’ = 2 s
1/f = 1/s + 1/s’
1/12 = 1/s + 1/2s
1/12 = 2/2s + 1/2s
1/12 = 3/2s
1 x 2s = 12 x 3
2s = 36
Diketahui: f = 12 cm ; M = 2 kali
Ditanyakan : s....?
Jawab :
M = l s’/s l
2 = s’/s
s’ = 2 s
1/f = 1/s + 1/s’
1/12 = 1/s + 1/2s
1/12 = 2/2s + 1/2s
1/12 = 3/2s
1 x 2s = 12 x 3
2s = 36
Editor: Ali A
Sumber: Buku IPA SMP/MTs Kemdikbud Kelas 8 edisi revisi 2017