How does refraction take place in …

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

Posted by Amarjit Yadav 1 year, 1 month ago

CBSE > Class 10 > Science

2 answers

Gopavalasa Kalyani 1 year, 1 month ago

When light comes from sun to the Earth's atmosphere it goes rarer medium to denser medium. It means starlight bends towards the normal . Stars are twinkling effect . planets doesn't twinkle because they are much closer to our earth than star and they seen as extended source. So they are not point -sized sources will average out to zero thereby nullifying the twinkling effect.

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Rajni Bisht 1 year, 1 month ago

Stars are point source of light . They twinkle due to refraction of light in atmosphere as the physical condition of atmosphere is not stationary and diff layers have different refractive index.we can take planet as a collection of point source of light each light refracts and they cancel out the effect of each other

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