Answer: at 2f, real, inverted, and same size.
- A at the focus
- B at 2f, real, inverted, and same size
- C at infinity
- D virtual and erect
Correct answer: B. at 2f, real, inverted, and same size
Explanation: For an object at 2f of a concave mirror the image is at 2f, real, inverted, and of the same size.
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.