Why does light splits into spectrum when it passes through prism only – InterviewSolution

1.	Why does light splits into spectrum when it passes through prism only and does not split when it passes through glass slab?
Answer» Rectangular glass slab has parallel refracting surfaces, the emergent ray is parallel to the incident ray. It slightly gets displaced laterally. While in case of prism the surface is not parallel and the light ray gets deviated at larger angle due to which it splits into its constituent colour.

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