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Verified answer
1][ cermin cekung
R = 40 cm → f = 20 cm
s = 10 cm (ruang 1)
sifat bayangan
• maya
• tegak
• diperbesar ← jwb
2][ cermin cembung
f = -30 cm
s = 15 cm
s' = __
jarak bayangan
1/s' + 1/s = 1/f
1/s' = 1/f - 1/s
1/s' = 1/(-30) - 1/15
1/s' = - 1/30 - 2/30 = - 3/30
s' = - 10 cm ← jwb