The twinkling of a star is due to atmospheric:
AReflection
BRetraction
CRetardation
DRefraction
Answer & Solution
Correct answer: D. Refraction
1. Starlight bends continuously on entering the atmosphere.
2. The refractive index changes gradually with height.
3. The cause is atmospheric refraction.
_Source: NCERT Class 10 Science, Ch 11 'The Human Eye and the Colourful World'_
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