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It is believed that any change in the gravitational field (caused by movement of masses) would propagate at the speed of light. And yes, that would be a constant.

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What is the speed of light in zero gravity?

Gravity does not effect speed of light ,so velocity is constant. Even if it effect the effect is negligible. So in short answer is 3*108ms-1 -Thunder


Does gravity affect the speed of light?

Gravity affects the fabric of space-time. So both space and time will be distorted.


Why do raindrops fall with a constant speed?

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If a car moving at a constant speed up a ramp?

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