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Science · 2026 · 3 marks
CBSE 2026 · Region 4 · Set 1 · Q36
Explain the phenomenon of rainbow formation in the sky. Draw the labelled ray diagram in support of your explanation.
Marking-scheme solution
Rainbow is caused by dispersion of sunlight by tiny water droplets, present in the atmosphere. The water droplets act like small prisms. They refract and disperse the incident sunlight, then reflect it internally, and finally refract it again when it comes out of the raindrop.
RAINDROP
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CBSE Class 10 Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.