MCAT Physics Question 120: Answer and Explanation
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Question: 120
15. Which of the following will not result in the splitting of white light into its component colors?
- A. Dispersion through a prism
- B. Diffraction through a grating
- C. Refraction within a thin film
- D. Reflection from an ideal convex mirror
Correct Answer: D
Explanation:
Light can be split into its component colors by dispersion, such as that through a prism, eliminating choice (A). Diffraction by a diffraction grating will also separate colors by their wavelengths, eliminating choice (B). The refraction of light within a thin film also leads to light dispersion as the different colors are refracted at slightly different angles in the film, eliminating choice (C). A mirror with significant aberration could lead to a separation of light into its component colors, but we are told that this is an ideal mirror. Thus, choice (D) is the correct answer.