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jadinya rumusnya
-1/F = 1/Si + 1/So
(Si=jarak bayangan,So=jarak benda)
-1/12 = 1 /8 + 1/So
-1/12 - 1/8 =1/So
-2/24 - 3/24 = 1/So
-5/24 = 1/So
So=24/-5
So=-4,8
Perbesaran bayangan = si/so
= 8/4,8
=1,6
Si = 8
PENY =
-1/F = 1/Si + 1/So
-1/12 = 1/8 + 1/So
1/So = -1/12 - 1/8
1/so = -2/24 - 3/24
= -5/24
so = 24/-5
so = -4,8 cm
M = si/so
= 8/4,8
= 1,6