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R = 20 cm
dit; M?
jwb: f = R/2
= 20/2 = 10 cm
1/f = 1/so+1/s1
1/10= 1/30 +1/s1
1/10-1/30 = 1/s1
20/300=1/s1
300/20=s1
15 = s1
M = s1/so
= 15/30=0.5 kali
s=30cm
R=20cm
f=1/2×R
f=1/2×20
f=10cm
Ditanyakan:
M (perbesaran)=??
Jawab :
1/f=1/s+1/s'
1/10=1/30+1/s'
1/10-1/30=1/s'
2/30=1/s'
s'=30/2
s'=15cm
M=s'/s
M=15/30
M=1/2 = 0,5
Jadi perbesaran bayangan pada cermin tersebut 0,5
JADIKAN SOLUSI TERBAIK YA:)