Jawabanmu

2014-05-08T12:39:26+07:00
Diketahui
h benda = 12 cm
s benda = 50 cm
f cermin = 20 cm
ditanya
a) s bayangan =............
b) h bayangan =..............
jawab
1/f = 1/ s benda + 1/s bayangan
1/ s bayangan = 1/ f - 1/ s benda
1/ s bayangan = 1/ 20 - 1/ 50
1/ s bayangan = 5/ 100 - 2/ 100
1/ s bayangan = 3 / 100
s bayangan     = 100/3
s bayangan     = 33,33 cm

M = s bayangan / s benda
M = 33,33 / 50
M = 0,67 kali

M    = h bayangan / h benda
0,67 = h bayangan / 12 cm
h bayangan = 0,67 × 12
h bayangan = 8,04 cm