Answer: 30.
- A 30
- B 35
- C 145
- D 155
Correct answer: A. 30
Explanation: M = fo/fe = 150/5 = 30. (for final image at infinity)
Concave mirror ray construction: a ray parallel to the axis reflects through F, and a ray through F reflects parallel, locating the inverted real image. Image: Maxmath12, CC0, via Wikimedia Commons.
Concept context
Reflection, refraction, lenses, mirrors, total internal reflection.