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s' = ?
penyelesaian
s'/s = M
s'/15 = 2
s' = 30
nah
1/f = 1/s + 1/s'
1/f = 1/15 + 1/30
1/f = 2+1/30
1/f = 3/30
1/f = 1/10
jadi, jarak fokus lensa tsb adalah 10 cm
s' = ?
s'/s = M
s'/15 = 2
s' = 30
1/f = 1/s + 1/s'
1/f = 1/15 + 1/30
1/f = 2+1/30
1/f = 3/30
1/f = 1/10