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28 how can we explain the reddish appearance of sun

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28. How can we explain the reddish appearance of sun at sunrise or sunset? Why does itnot appear red at noon?
29. Explain the phenomenon of dispersion of white light through a glass prism, usingsuitable ray diagram.Ans.14
30. How does refraction take place in the atmosphere? Why do stars twinkle but not theplanets?
15
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Tags
Total internal reflection, Geometrical optics

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