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| Q. |
A star appears twinkling in the sky because of – |
| A. | scattering of light by atmosphere |
| B. | reflection of light by atmosphere |
| C. | refraction of light by atmosphere |
| D. | diffraction of light by atmosphere |
| Answer» C. refraction of light by atmosphere | |
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Explanation: A star appears twinkling in the sky because of refraction of light, by atmosphere. Light bends when it passes obliquely from one medium to another. This is called refraction of light. |
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