a star appears slightly higher than its actual position when you near the Horizon. Give reason
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The stars seem to be higher in the sky than they actually are due to atmospheric refraction. As the light rays from a star pass through the different layers of atmosphere (density of layers increasing downwards), they suffer atmospheric refraction from a rarer to a denser medium
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ᴀɴsᴡᴇʀ:
The air in the atmosphere consists of different layers of different densities. The density is maximum near the surface of Earth. Refraction takes place at the surface of each layer. Because of atmosphere refraction all-stars except those directly overhead, appeared slightly above the horizon than they really are.
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