A. 4. 0 cm
B. 3. 0 cm
C. 12.0 cm
D. 9.0 cm
Correct Answer:
Option C = 12.0 cm
Explanation
f = -12 cm, v = – 6 cm
(1)/v + (1)/u =(1)/f
(1)/-6 + (1)/u = (1)/-12
(1)/u = (1)/-12 + (1)/6 = (1 + 2)/12 = (1)/12
∴ u = 12 cm
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