Question

Diket : h = 5 cm
s = 30 cm
s' = 60 cm
Ditanya : a. f ?
b. h' ?
Jawab : ...

Answer 1

A. 1/f = 1/ so + 1/si
1/f = 1/30 + 1/60
1/f = 2/30 +1/60
f = 60/3 = 20cm

b. h' = h x s' /s = 5 x 60 /30 = 10cm