本题目来源于试卷: Astrophysics and Cosmology，类别为 IB物理学
[问答题]
What is a geodesic? Whjuu su .n7yl 6o .7e/nv)rvtq7at i0/zu9v ay7xg*in hjy +s its role in General Relativity?
参考答案:
A geodesic is the shortest distance between two points on a surface. Its role in General Relativity is to help us explain curved space-time. Light always travels by the shortest and most direct path between two points (a geodesic) and if this path is curved it means that space itself is curved. Seeing gravity as the cause of this curvature is a fundamental idea of General Relativity.
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