Question

Tolong jelaskan gan...

Answer 1

Si1 = 30cm
So1 = 15 cm
f=?
1/f = 1/si + 1/so
1/f = 1/30 + 1/15
1/f = 3/30
f = 10cm

So2 = 15-3 = 12cm
Si2=?
1/f = 1/si + 1/so
1/10 = 1/si + 1/12
1/10 - 1/12 = 1/si
6-5/60 = 1/si
1/60 = 1/si
60 = Si2