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R = 30 cm
1/s' = 2/R - 1/s
1/s' = 2/30 - 1/10
1/s' = 2-3/30
1/s' = -1/30
s' = -30 cm
Sifat bayangan = maya, diperbesar, terbalik
cermin cekung
s = 10 cm
R = 30 cm ⇒ f = 15 cm
dit :
sifat bayangan
jawab :
a) mencari s' dahulu
1/s' = 1/f - 1/s
1/s' = 1/15 - 1/10
1/s' = (2 - 3) / 30
1/s' = - 1 / 30
s' = - 30 cm ⇒ maya
b) mencari perbesaran (M)
M = s' / s
M = 30 / 10
M = 3 kali ⇒ diperbesar
c) Sifat bayangannya adalah maya, tegak, dan diperbesar
Semoga membantu ^_^