# Stars in the sky appear to twinkle due to _____ ? with Answer - Everyday Science Mcqs | TestPrep

> Solved MCQ: Stars in the sky appear to twinkle due to _____ ? Correct Answer: A. a series of refractions. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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# Stars in the sky appear to twinkle due to _____ ?

Direct Answer & Quick Reference

The correct option is **A. a series of refractions**.

Twinkling of stars is due to atmospheric refraction. There are different layers in the atmosphere with varying temperature and density. This results in the variation of refractive ...

A. a series of refractions **(Correct Answer)**

B. a series of reflections

C. a surface tension phenomenon

D. multiple diminishing brightness

✨ Explain with AI

Verified Key: A. a series of refractions
Solved by 5,633+ students

**Detailed Explanation & Reference:**

Twinkling of stars is due to atmospheric refraction. There are different layers in the atmosphere with varying temperature and density. This results in the variation of refractive index of the atmosphere with time. So, when the light from a star passes through these different layers, it experiences different levels of refraction. Thus, the image of the star gets distorted constantly in brightness and position which makes the star look like its twinkling.

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