Jawabanmu

2014-06-02T14:51:08+07:00
1/f = 1/s+1/s' = 1/15+1/30 =2/30-1/30=1/30
f=30 cm
Jawaban paling cerdas!
2014-06-02T14:56:24+07:00
1/f=1/s+1/s'=1/15+1/30=2/30+1/30=3/30=1/10
maka jarak titik api cermin yaitu 10 cm

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