Home › UP Board Class 10 › Science › The Human Eye and the Colourful World › The twinkling of stars is due to:
The twinkling of stars is due to:
Answer & Solution
Correct answer: A.
1. Starlight crosses air layers of differing temperature and density.
2. Each layer has a slightly different refractive index, refracting the ray.
3. The continually fluctuating refraction makes the star's brightness flicker — twinkling.
_Source: NCERT Class 10 Science, Ch 10 "The Human Eye and the Colourful World", §10.5_
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