Question

Tolong jawab pakai cara ya....

Answer 1

1/f = 1/s + 1/s'
1/10 - 1/15 = 1/s'
3-2/30 = 1/s'
s' = 30 cm

Answer 2

Si = 15 cm
f = 10 cm

1/f = 1/So+1/Si
1/10 = 1/15 + 1/Si
1/Si = 1/10 - 1/15
1/Si = 3/30 - 2/30 
1/Si = 1/30
Si = 30 cm di depan cermin (d)