Physicsmedium · Past Paper
When light enters a prism, why does it split?
ABecause of reflection at the surface
BBecause different colors have different speeds in glass
CBecause the prism is triangular
DBecause of the intensity of light
✓ Correct Answer: B — Because different colors have different speeds in glass
The refractive index of glass varies for different wavelengths, causing each color to bend at a different angle.
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