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s = 15cm
f = 10cm
Dit:
a. s'
b. sifat bayangan
jawab:
1/s' = -1/f - 1/s
1/s' = -1/10 - 1/15
1/s' = -3/30 - 2/30
1/s' = -5/30
s' = -30/5
s' = -6cm
b . sifat bayangan : maya (krna s' - ), diperkecil ( M = s'/s ), sama tegak.