alleryDispersion of white light by a prism produces a spectrum because:
ADifferent colours refract by different amounts
BGlass absorbs only red light
CPrism reflects light inside
DLight is polarised by the prism
Answer & Solution
Correct answer: A. Different colours refract by different amounts
1. Refractive index n depends slightly on wavelength (dispersion).
2. Violet has the LARGEST refractive index → bends MOST.
3. Red has the SMALLEST n → bends LEAST.
4. The seven colours separate into the familiar VIBGYOR spectrum.
_Source: syllabus Science Ch 10 §10.3 Dispersion through a Prism_
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