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1/0,3= 1/0,4 + 1/s'
1/s' = 1/0,3-1/0,4
s' = 1,2 meter
M = s'/s = 1,2/0,4 = 3 kali
M= h'/h = h'/6 cm
3= h'/6 cm
h' = 3x6 = 18 cm
so = 0,4 m
= 40 cm
R = 0,6 m
= 60 cm
ho = 6 cm
ditanya =
hi = ...
dijawab =
2 / R = 1 / so + 1 / si
1 / si = 2 / R - 1 / so
= 2 / 60 - 1 / 40
= 4 / 120 - 3 / 120
1 / si = 1 / 120
si = 120 cm
M = -si / so
= -120 cm / 40 cm
= -3
M = 3 kali secara terbalik
M = hi / ho
hi = M . ho
= -3 . 6 cm
= -18 cm
hi = 18 cm secara terbalik