do = 10 cm = 0,1 m
di = 50 m
1/f = 1/do + 1/di
1/f = 1/0,1 + 1/50
1/f = 10 + 0,02
1/f = 10,02
f = 1/10,02
f = 0,0998 m or 9,98 cm
Jadi, jarak titik fokus cermin cekung tersebut sekitar 9,98 cm.
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do = 10 cm = 0,1 m
di = 50 m
1/f = 1/do + 1/di
1/f = 1/0,1 + 1/50
1/f = 10 + 0,02
1/f = 10,02
f = 1/10,02
f = 0,0998 m or 9,98 cm
Jadi, jarak titik fokus cermin cekung tersebut sekitar 9,98 cm.