Stars appear to be higher in the sky than actually they are because of
The cold air layers of the atmosphere behave as optically
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How much time from sunrise to sunset is lengthened because of atmospheric refraction ?
Sun appears to be risen before the actual sun rise because of
The sun can be seen before the actual sunrise by about
By how much time is the sunset delayed due to atmospheric refraction ?
To an observer on Earth the stars appear to twinkle. This is due to
Why does Sun appear slightly oval shaped at morning and evening ?
Deviation of light as it passes through the atmosphere due to variation in air density is called
When light rays from stars enter into earth’s atmosphere, it travels from
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