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-1/10 =1/15+1/s’
-1/s’ = 1/15 + 1/10
-1/s’ =2/30 + 3/30
-1/s’= 5/30
s’ = -30/5 = -6 cm
jarak banyangan 6 cm dibelakang cermin
perbesarannya s'/so = 6/15 = 0.4 kali
tingginya M x To = 0,4 x 5 = 2 cm
1/s1 + 1/s0 = 1/f
1/s1 + 1/15 = 1/10
1/s1 = 1/10 - 1/15 = 3/30 - 2/30 = 1/30
jd jarak bayangan 30 cm
pembesaran bayangan
M= s1/s0 = 30/15 = 2 kali
tinggi bayangan
h1 = M x h0 = 2 x 5 = 10 cm
semoga membantu...