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Physics - Section 1 :: Discussion
| 34. | Stars twinkle because | |
| A. | the intensity of light emitted by them changes with time | |
| B. | the distance of the stars from the earth changes with time | |
| C. | the refractive index of the different layers of the earth's atmosphere changes continuously, consequently the position of the image of a start changes with time | |
| D. | the light from the star is scattered by the dust particles and air molecules in the earth's atmosphere | |
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