Jawabanmu

2014-06-09T17:49:55+07:00
3. b
1/4 + 1/5so = 1/f
5/20 + 1/20 = 6/20
f= 3 1/3

4. a
1/0,3 + 1/0,15 = 1/si
= 0,1

5. e
1/20 + 1/5 = 1/si
si = -4
bisa caranya lebih jelas lagi makasih
bisa lbih jlas lgi caranya makasih
2014-06-09T17:59:58+07:00
3. s= 4 cm M= 5 kali
F=?
M= s'/s => s' = M.s = 5.4 = 20 
1/f = 1/s + 1/s'
=1/4+1/20 = 5+1/20 = 6/20 = 20/6 = 3  2/6 => 3 1/3 (b)

4. s= 0,3 f= 0,15 
1/-f + 1/s+1/s' => 1/s' = 1/-f +1/s = 1/-0,15 - 1/ 0,3 = -1-0,5/0,15 = -1,5/0,15 = - 10 (a)

5.1/f=1/s+1/s' => 1/s'=1/f-1/s = 1/-5 -1/20 = -4-1/20 = -5/20 = 20/-5 = -4(e)
kalau yg alat optik aku engga ngerti
ok makasih ya
iya sama"
maaf ya kalau salah,, terutama no 4 masi ragu"