According to general relativity, light : travels along a curve due to length contraction
travels in a straight line
travels along a curve due to uniform speed
travels along a curve due to uniform gravity

travels along a curve due to uniform gravity

Explanation:

General relativity

The theory was developed by Albert Einstein , it is the theory of gravitation , according to which , the gravitation effect which is observed between the masses , is the resultant of their warping of the space time .

In general relativity , the equivalence principle is the equivalence of inertial gravitational mass .

According to which , the light bends due to gravitational forces ,therefore ,  the light travels along a curve because of uniform gravity .

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