Sachsen-Anhalt Abitur Physics Practice Questions - Saxony-Anhalt Abitur Physics (Physik) Exam

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An object is placed 30 cm in front of a thin converging lens with a focal length of 10 cm. Using the thin-lens equation 1/f = 1/a + 1/b, at what distance b behind the lens does the real image form?

15 cm 7.5 cm 20 cm 30 cm

Correct Answer:

15 cm

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