why star twinkle?
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The twinkling of a star is due to the atmospheric refraction of starlight. The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. The atmospheric refraction occurs in a medium of gradually changing refractive index.
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it is true that (−8x − 3)(ax − 2) − 53 = 24x2 +25x −47. (This can be seen by multiplying each side of the given equation by ax − 2). This can be rewritten as −8ax2+ 16x − 3ax = 24x2+ 25x − 47.
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