Question

5. Why do we experience horizon?
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Answer 1

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Usually, the density of the air just above the surface of the Earth is greater than its density at greater altitudes. This makes its refractive index greater near the surface than at higher altitudes, which causes light that is travelling roughly horizontally to be refracted downward.

Answer 2

Answer:

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Explanation:

Usually the density of the air just above the surface of the earth is greater than its density at greater altitudes near the surface than at higher altitudes,which causes light that is travelling roughly horizontally to be refracter downward