what causes atmospheric refraction??mention its 2 effects..
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atmospheric refraction is caused because different layers of the atmosphere are not equally denser. some are rarer and some are denser. so when the light rays strike s the atmosphere it gets refracted due to change in the layers.
effects are, star appears to be twinkle
we can see the sun rise and sunset about 2 mins earlier and 2mins after the actual sunset
effects are, star appears to be twinkle
we can see the sun rise and sunset about 2 mins earlier and 2mins after the actual sunset
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