Cermin Cekung
s = 20 cm (di ruang II)
f = 20-5 = 15 cm
1/f = 1/s + 1/s'
1/s` = 1/15 - 1/20
1/s' = 1/60
s' = 60 cm
Perbesaran = s'/s = 60/20
= 3 kali
Sifat bayangan = Nyata, Terbalik, Diperbesar(di ruang III)
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Cermin Cekung
s = 20 cm (di ruang II)
f = 20-5 = 15 cm
1/f = 1/s + 1/s'
1/s` = 1/15 - 1/20
1/s' = 1/60
s' = 60 cm
Perbesaran = s'/s = 60/20
= 3 kali
Sifat bayangan = Nyata, Terbalik, Diperbesar(di ruang III)