By how much time the day would be reduced if earth do not had atmosphere. Also define Prism
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The time from sunrise to sunset is increased by about four minutes because of the refraction of light through the earth's atmosphere.
If the earth had no atmosphere, the length of the day would have been shorter by about four minutes.
A prism is a transparent solid body, often having triangular bases, used for dispersing light into a spectrum or for reflecting rays of light.
In Geometry, a solid having bases or ends that are parallel, congruent polygons and sides that are parallelograms.
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