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1/s + 1/s' = 1/f
1/10 + 1/s' = 1/5
1/s' = 1/5 - 1/10 --> samakan penyebutnya
1/s' = 2/10 - 1/10
1/s' = 1/10
s' = 10 cm
a) tinggi bayangan = h'
h'/h = s'/s
h'/2 = 10/10
h' = 2 cm
b) sifat bayangan
Nyata, terbalik, sama besar