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cermin cekung
R = 8 cm ⇒ f = 4 cm
s = 24 cm
dit :
a) M (perbesaran)
b) sifat bayangan
jawab :
a) mencari s' dahulu
1/s' = 1/f - 1/s
1/s' = 1/4 - 1/24
1/s' = (6 - 1) / 24
1/s' = 5 / 24
s' = 24 / 5
s' = 4,8 cm
⇒ M = s' / s
M = 24 / 5 / 24
M = 1/5 kali
b) sifat bayangan : nyata, terbalik, dan diperkecil
Semoga membantu ^_^