Tolong bantu jawaban no 55

Data:
f = 40 cm
s = 60 cm
s' = ?

Penyelesaian:

Jarak bayangan:
1/s' = 1/f - 1/s
1/s' = 1/40 - 1/60
1/s' = 3/120 - 2/120
1/s' = 1/120
s' = 120 cm

Pembesaran bayangan:
M = |s'/s|
M = |120/60|
M = 2

dik
S = 60 cm
f = 40 cm

dit S' & M__?
S' = S × f/s -f
S' = 60 × 40 / 60 - 40
S' = 2400 / 20
S' = 120 cm

M = S'/S
M = 120/60
M = 2 kali