Lesson: Chapter 5 — Optics

5.2. Curved (spherical) mirrors 4 of 5 Reset answers

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Question 4

A concave mirror has a focal length of 15 cm. What is its radius of curvature?

A 7.5 cm B 45 cm C 30 cm D 15 cm

The right answer is the one marked above.

30 cm. r = 2f = 2 × 15 cm.

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