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Science · 2025 · 1 mark
The Human Eye and the Colourful WorldDispersion of White Light by a Glass Prism1 markAnalyseassertion reason
CBSE 2025 · Region 4 · Set 3 · Q20
Assertion (A): White light is dispersed by a glass prism into seven colours. Reason (R): The red light bends the least while the violet the most when…
Assertion (A) : White light is dispersed by a glass prism into seven colours.
Reason (R) : The red light bends the least while the violet the most when a beam of white light passes through a glass prism.
Official answer
(B)
Both, Assertion (A) and Reason (R) are true, and Reason (R) is not the correct explanation of Assertion (A).
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.