Jawabanmu

2014-05-30T19:54:49+07:00
Dik : s = 40
h = 20
r = 60


f = 1/2 R
1/2 60
30
2014-05-30T20:01:51+07:00
A. f =  \frac{1}{2} R
f =  \frac{1}{2}60
f = 30 cm

b.  \frac{1}{f} =  \frac{1}{s} +  \frac{1}{s'}
 \frac{1}{30} = \frac{1}{40} + \frac{1}{s'}
 \frac{1}{30} - \frac{1}{40} = \frac{1}{s'}
 \frac{4-3}{120} =  \frac{1}{s'}
 \frac{1}{120} = \frac{1}{s'}
120 = s'

c. M =  \frac{-s'}{s}
M =  \frac{-120}{40}
M = -3

d. M =  \frac{h'}{h}
-3 =  \frac{h'}{20}
-60 = h'

e. sifat bayangan: nyata, terbalik, diperbesar