Answer: 1/f = 1/v + 1/u.
- A 1/f = 1/v + 1/u
- B 1/f = 1/v - 1/u
- C f = uv/(u+v)
- D f = (v-u)/uv
Correct answer: A. 1/f = 1/v + 1/u
Explanation: Mirror formula: 1/f = 1/v + 1/u (using New Cartesian sign convention).
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.