Answer: Violet.
- A Red
- B Orange
- C Yellow
- D Violet
Correct answer: D. Violet
Explanation: Violet light has the shortest wavelength and is refracted most by glass (highest refractive index). This causes dispersion.
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.