Answer: 25 cm.
- A 10 cm
- B 25 cm
- C 50 cm
- D Infinity
Correct answer: B. 25 cm
Explanation: The near point (least distance of distinct vision) for a normal human eye is about 25 cm.
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.