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R=60 cm
F= R/2=30 cm
S=10 cm
1/s + 1/s’ = 1/f
1/10 + 1/s’ = 1/30
1/s’ = 1/30 - 1/10
1/s’ = 1/30 - 3/30
1/s’ = -2/30
S’ = -15 cm (minus artinya bayangan di belakang cermin)
Perbesaran bayangan = M = s’/s = 15/10 = 1.5 kali
Tinggi bayangan
M= h’/h
1,5=h’/3
h’= 4,5 cm
Sifat bayangan = maya, diperbesar, tegak