Question

How does refraction take place in the atmosphere? Why do
stars twinkle but not the planets?
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Answer 1

Answer:

stars twinkle because they appears as pinpoints of light in the night sky even when viewed through a telescope . because all the light is coming from a single point.

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Answer 2

$\huge\bigstar\mathfrak\pink{\underline{\underline{ANSWER:}}}$

As we move above the earth's surface, the density of air goes on decreasing. Light travelling from refer to denser layers always bends towards the normal. Thus, the position of the object emitting light appears shifted.Continuously change physical condition of atmosphere refracts light from the stars, which are considered as point sources, by different amounts from one moment to the other-- when the atmosphere refracts more starlight towards us the stars appears to be bright and when the atmosphere refracts less starlight then the stars appears to be dim.

However, the planets are nearer to us than the stars, hence they can't be considered as point sources, hence no twinkling.

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