Answer: Infinity toward mirror (real).
- A Focus to infinity
- B Focus to mirror
- C Infinity toward mirror (real)
- D Mirror to beyond center
Correct answer: C. Infinity toward mirror (real)
Explanation: For concave mirror: as object moves from infinity toward F, real image moves from F toward infinity... wait. Object beyond C: image between F and C. Object at C: image at C. Object between C and F: image beyond C (moving away). So as object moves from infinity toward F, image moves from F toward 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.