Question

What is geodesic? Explain

Answer 1

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a geodesic
denoting the shortest possible line between two points on a sphere or other curved surface.
 a curve whose tangent vectors remain parallel if they are taken along it.
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Answer 2

In differential geometry, a geodesic is a Generalization of the notion of a straight line to curved spaces. The term geodesic comes from geodesy, the science of measuring the size and shape of earth; in the original sense, a geodesic was the shortest route between two points on the earth's surface namely, a segment of a great circle.
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