A scientist wants to demonstrate that dispersion depends on wavelength. She shines monochromatic red light through a prism. What does she observe and why?

Question

A scientist wants to demonstrate that dispersion depends on wavelength. She shines monochromatic red light through a prism. What does she observe and why? — Exam MCQ

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A. Only a single red ray emerges; no spectrum forms because there is only one wavelength — Red light is monochromatic, meaning it has essentially one wavelength. A prism may deviate it but cannot split it into a spectrum of different colours.

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B. Red light is absorbed, so nothing emerges

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C. Multiple red rays emerge, each at a different angle

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D. A full spectrum appears, showing all colors

A scientist wants to demonstrate that dispersion depends on wavelength. She shines monochromatic red light through a prism. What does she observe and why?

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