Question

Sebuah cermin cembung memiliki jarak fokus 10 cm jarak benda 2 cm tentukan jarak bayangan nya

Answer 1

1/f = 1/s + 1/s'
1/10 = 1/2 + 1/s'
1/s' = 1/10 - 1/2
1/s' = 1/10 - 5/10
1/s' = -4/10
s' = -2,5 cm

Answer 2

-1/f=1/s+1/s'
-1/10=1/2+1/s'
-2-10/20=1/s'
s'= -6/10=-3/5