Answer: 4.
- A 4
- B 5
- C 6
- D 7
Correct answer: A. 4
Explanation: n = 360/theta - 1 = 360/72 - 1 = 5 - 1 = 4 images (when 360/theta is even integer and object not on bisector).
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.