Question

Cermin cekung dengan jari 20cm jika benda berada pada jarak 25cm lukislah bayangan benda dan tentukan sifatnya

Answer 1

Verified answer

R = 20 cm
s = 25 cm

R = 2f
20 = 2f
f = 20/2 = 20 cm

1/s + 1/s' = 1/f
1/25 + 1/s' = 1/10
1/s' = 1/10 - 1/25
1/s' = (5-2)/50
1/s' = 3/50
s' = 50/3
s' = 16,6 cm
bayangan nyata