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A concave mirror has f = 15 cm and the object is 30 cm away. Find v.
A30 cm, virtual
B30 cm, real
C60 cm, real
D15 cm, real
Answer & Solution
Correct answer: B. 30 cm, real
With f = -15 cm and u = -30 cm, 1/v = -1/15 + 1/30 = -1/30, so v = -30 cm, a real image at the centre of curvature.
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