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0 -1/100= 1/f
F = -100cm
P= 100/F
= 100/-100
= -1 D
S' = 100 cm
menderita Miopi
dit : P ?
dijwb :
P = -100/100
= - 1 D
catatan : tanda mines menunjukkan jns kacamata y dipakai (lensa cekung)