Jawabanmu

2014-05-05T19:34:14+07:00
A. 1/s' = 1/f - 1/s 1/s' = 1/40 - 1/120 1/s' = 2/120 s' = 60 cm jarak bayangan = 60 cm b.perbesaran = s'/s 60 cm/ 120 m = 0,5 kali
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2014-05-05T19:38:23+07:00
A) s^i = s.f/s-f
     = 120.40/80
     = 1.5

b) M = f/s-f
     = 40/80
     = 0.5

c)  M : 1.5/120 = h^i/15
       1,5. 15     = 120.h^1
       22,5         = 120.h^1
       h^1           = 120/22.5
                       = 5.3
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