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Nagasaki Public High School Entrance Examination - Science Practice Questions - Nagasaki Prefectural High School Entrance Examination - Science (長崎県公立高等学校入学者選抜学力検査 理科) Exam

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An object is positioned 30 cm in front of a convex lens with a focal length of 10 cm. Using the thin lens formula 1/f = 1/a + 1/b (where a is object distance and b is image distance), calculate the distance of the real image from the lens.
Correct Answer:
15.0 cm

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